Pulsar aims to not only reach feature parity with the original Atom text editor, but update the underlying architecture and support modern features.
    

Pulsar


      GHex is a hex editor for the GNOME desktop.
    
      
      GHex can load raw data from binary files and display them for editing in the
      traditional hex editor view. The display is split in two columns, with
      hexadecimal values in one column and the ASCII representation in the other.
      GHex is a useful tool for working with raw data.
    
    

GHex

Qt Creator provides a cross-platform, complete integrated development environment (IDE) for application developers to create applications for multiple desktop and mobile device platforms, such as Android and iOS.Qt Creator enables a team of developers to share a project across different development platforms with a common tool for development and debugging.The main goal for Qt Creator is meeting the development needs of Qt developers who are looking for simplicity, usability, productivity, extendibility and openness, while aiming to lower the barrier of entry for newcomers to Qt.

Qt Creator

Provides a cross-platform, complete integrated development environment (IDE) for application developers to create applications for multiple platforms and devices

The Eclipse IDE delivers what you need to rapidly innnovate.Polyglot language support: First class support for Java, JavaScript/TypeScript, C/C++, PHP, Rust, and othersCommunity powered: More and more the Eclipse IDE is being powered by individual contributors all around the worldImproved Java development tooling: Improved code templates and added various quick fixesBetter UI: Streamlined the UI through inline rename, a brand new Quick Search dialog and a better dark themeProven extensibility: A huge variety of platform plug-insFree and open source: Free and open source released under the terms of the Eclipse Public License 2.0

Eclipse IDE for Web and JavaScript Developers

The essential tools for any JavaScript developer, including JavaScript, TypeScript, HTML, CSS, XML, Yaml, Markdown languages support

UEFITool is a cross-platform open source application, that parses UEFI PI-compatible firmware image into a tree structure, verifies image integrity and provides a GUI to manipulate image elements.

UEFITool

An unofficial client to install Unreal Engine, download and manage purchased assets, projects, plugins and games from the Epic Games Store
      Features:
      
        Downloading purchased assets from unreal marketplace
        Downloading official binary Unreal Engine packages
        Adding assets to projects and creating new projects from assets
        Listing and launching Unreal projects
        Listing and launching Unreal Engine installations
      
    

Epic Asset Manager

NOTE: This Flatpak is unofficial and not supported by Godot Engine developers.
      Find officially supported binaries on godotengine.org.
    
      Godot is an advanced, feature-packed, multi-platform 2D and 3D open source game engine.
      Create games with ease, using Godot's unique approach to game development.
      
        Nodes for all your needs. Godot comes with hundreds of built-in nodes that make game design a breeze. You can also create your own for custom behaviors, editors and much more.
        Flexible scene system. Create node compositions with support for instancing and inheritance.
        Visual editor with all the tools you need packed into a beautiful and uncluttered context-sensitive UI.
        Friendly content creation pipeline for artists, level designers, animators and everything in between.
        Persistent live editing where changes are not lost after stopping the game. It even works on mobile devices!
        Create your own custom tools with ease using the incredible tool system.
      
      Limitations of the Flatpak version:
      
        C#/.NET external editor support does not work out-of-the-box, though this is currently being discussed and worked on. See: https://github.com/flathub/org.godotengine.GodotSharp/issues/2
        External script editors are still supported (for use outside of C#/.NET), but you need to follow the steps described here: https://github.com/flathub/org.godotengine.GodotSharp#using-an-external-script-editor
        After the first C# script is created, it is necessary to click Build within Godot. Alternatively, running dotnet restore in the IDE's terminal would work as well.
        Godot 4's Blender importer is supported, but Blender needs to be installed on your system and you need to follow the steps described here: https://github.com/flathub/org.godotengine.GodotSharp#using-blender
      
    

Godot (C#/.NET)

Gitnuro is a Git client that allows you to manage multiple repositories with a modern experience and live visual representation of your repositories' state.

Gitnuro


      Cambalache is a new RAD tool that enables the creation of user interfaces
      for Gtk and the GNOME desktop environment.
    
      
      Cambalache's main target is Gtk version 4 but it has been designed from
      the ground up to support other versions.
    
    

Cambalache

GoLand is a cross-platform IDE built specially for Go developers
      
      		GoLand is available for a free 30-day evaluation. Monthly and yearly subscription options are
      		available for companies and individual users.
    	
      
			If you want to use the Go installation of your system, flatpak mounts your root directory into /var/run/host .
			You can set your GOROOT accordingly (e.g. /var/run/host/usr/lib/go).
		
      NOTE: This wrapper is not verified by, affiliated with, or supported by JetBrains s.r.o.
    

GoLand


      gitg is a graphical user interface for git. It aims at being a small,
      fast and convenient tool to visualize the history of git repositories.
      Besides visualization, gitg also provides several utilities to manage your
      repository and commit your work.
    
      Goals:
      
        Browse local git repositories
        Clone local and remote git repositories
        Commit files
        Retrieve patch from a commit
      
    

gitg

Sublime Merge is a Git client, from the makers of Sublime Text. Line-by-line Staging. Commit Editing. Unmatched Performance.
    

Sublime Merge

Sublime Merge is a Git client, from the makers of Sublime Text

Qt Designer lets you created and edit .ui files for your Qt Widgets Application
    

Qt Designer

RedisInsight is an intuitive and efficient GUI for Redis, allowing you to interact with
            your databases and manage your data—with built-in support for Redis modules.
      
            RedisInsight Highlights:
        
      
        Browse, filter, visualise your key-value Redis data structures and see key values in
                different formats (including JSON, Hex, ASCII, etc.)
        CRUD support for lists, hashes, strings, sets, sorted sets, and streams
        CRUD support for [JSON](https://redis.io/json/) data structure
        Interactive tutorials to learn easily, among other things, how to leverage the native JSON data structure 
                supporting structured querying and full-text search, including vector similarity search for your AI use cases
        Contextualised recommendations to optimize performance and memory usage. The list of recommendations gets updated 
                as you interact with your database
        Profiler - analyze every command sent to Redis in real-time
        SlowLog - analyze slow operations in Redis instances based on the Slowlog command
        Pub/Sub - support for Redis pub/sub, enabling subscription to channels and posting
                messages to channels
        Bulk actions - Delete the keys in bulk based on the filters set in Browser or Tree
                view
        Workbench - advanced command line interface with intelligent command
                auto-complete, complex data visualizations and support for the raw mode
        Command auto-complete support for [search and query](https://redis.io/search/) capability, [JSON](https://redis.io/json/) and 
                [time series](https://redis.io/timeseries/) data structures
        Visualizations of your [search and query](https://redis.io/search/) indexes and results
        Ability to build your own data visualization plugins
        Built-in click-through guides for Redis capabilities
        Officially supported for Redis OSS, [Redis Cloud](https://redis.io/cloud/). Works with Microsoft Azure Cache for Redis
      
    

Redis Insight

KDevelop is a Free and Open Source integrated development environment (IDE).
      It provides editing, navigation and debugging features for several programming languages, as well as integration with multiple build systems and version-control systems, using a plugin-based architecture.
      KDevelop has parser backends for C, C++ and Javascript/QML, with further external plugins supporting e.g. PHP or Python.
    

KDevelop

Featureful, plugin-extensible IDE for C/C++ and other programming languages

A mod of Scratch with a compiler to run projects faster, dark mode for your eyes, a bunch of addons to improve the editor, and more.
      Features:
      
        Runs projects up to 100x faster than Scratch
        Uses significantly less memory and energy than Scratch when idle
        Dark mode
        Developer tools, searchable dropdowns, onion skinning
        Many more addons and customizability options
        Native filesystem and file explorer integration
        Less lag when editing large projects
        Optional support for interpolation, 60 FPS, high quality pen, infinite clones
        Backpack
        and more
      
      You can also use TurboWarp in your browser at https://turbowarp.org/editor
      Project shown in screenshots is https://scratch.mit.edu/projects/425020125/
    

TurboWarp


      ImHex is a modern Hex Editor for Reverse Engineers, Developers, Malware Analysists and Hackers who value
      their retinas when working at 3 AM once again.
    
      
      Features:
    
      
        Featureful hex view
        Custom C++-like pattern language for parsing and highlighting a file's content
        Data importing and exporting
        Data inspector allowing interpretation of data as many different types
        Huge file support with fast and efficient loading
        Strings search
        File hashing support
        Disassembler supporting many different architectures: ARM, x86, PowerPC, MIPS, and more
        Bookmarks
        Data analyzer
        
        Helpful tools such as an Itanium and MSVC demangler, ASCII table, Regex
        replacer, mathematical expression evaluator (calculator), hexadecimal
        color picker and many more
      
        Doesn't burn out your retinas when used in late-night sessions
      
    

ImHex


			micro is a terminal-based text editor that aims to be easy to use and
			intuitive, while also taking advantage of the capabilities of modern terminals.
			It comes as a single, batteries-included, static binary with no dependencies;
			you can download and use it right now!
		
      
			As its name indicates, micro aims to be somewhat of a successor to the nano
			editor by being easy to install and use. It strives to be enjoyable as a full-time
			editor for people who prefer to work in a terminal, or those who regularly
			edit files over SSH.
		
    

Micro Text Editor

A modern and intuitive terminal-based text editor

The Clipboard Project is your new second brain.

This is an advanced clipboard manager that's super easy to use. Cut, copy and paste anything, anytime, anywhere with unlimited capacity, clipboards, and history!

Script CB to work superbly with your other favorite terminal tools. Integrate it with your existing system clipboards. Save time and effort the easy way.You can use CB from the desktop to monitor your clipboard status in real time.

To use CB from the terminal, do "flatpak run app.getclipboard.Clipboard". If you'd like to use the command "cb" instead, do "alias cb='flatpak run app.getclipboard.Clipboard'" to make a shortcut. Then, add that to your terminal startup file like .bashrc so that it works every time.

Clipboard

Cut, copy, and paste anything, anytime, anywhere

&lt;em&gt;NOTE: This Flatpak is unofficial and not supported by Godot Engine developers.&lt;/em&gt; Find officially supported binaries on godotengine.org.Godot is an advanced, feature-packed, multi-platform 2D and 3D open source game engine.Create games with ease, using Godot's unique approach to game development.Nodes for all your needs. Godot comes with hundreds of built-in nodes that make game design a breeze. You can also create your own for custom behaviors, editors and much more.Flexible scene system. Create node compositions with support for instancing and inheritance.Visual editor with all the tools you need packed into a beautiful and uncluttered context-sensitive UI.Friendly content creation pipeline for artists, level designers, animators and everything in between.Persistent live editing where changes are not lost after stopping the game. It even works on mobile devices!Create your own custom tools with ease using the incredible tool system.Limitations of the Flatpak version:For C#/Mono support, install org.godotengine.Godot3Sharp instead: https://flathub.org/apps/org.godotengine.Godot3SharpExternal script editors are supported, but you need to follow the steps described here: https://github.com/flathub/org.godotengine.Godot3#using-an-external-script-editor

Godot 3

Filius is a network simulator for educational purpose.

Filius


      Source Code Management system designed to manage your branches, record and backup your work, be your Git client, help with your code and much more.
    
    

GitButler

Git branch management tool, built from the ground up for modern workflows

HTTPie Desktop is a cross-platform API testing client for humans. It offers all the user-friendliness of the terminal version of httpie, now wrapped up in a sleek graphical interface.Interact painlessly with APIsLeverage the power of AI-assisted workOrganize your work in spaces, collections, and tabsParametrize requests with variables and environmentsWork across devices with auto-save and realtime syncBuild and preview requests without sending themUse the app offline and without an account

HTTPie

Cross-platform API testing client for humans

Muon is a graphical SSH client. It has a enhanced SFTP file browser, SSH terminal emulator, remote resource/process manager, server disk space analyzer, remote text editor, huge remote log viewer and lots of other helpful tools, which makes it easy to work with remote servers. Muon provides functionality similar to web based control panels but, it works over SSH from local computer, hence no installation required on server. It runs on Linux and Windows. Muon has been tested with serveral Linux and UNIX servers, like Ubuntu server, CentOS, RHEL, OpenSUSE, FreeBSD, OpenBSD, NetBSD and HP-UX.
    

Muon

Graphical SFTP client and terminal emulator with helpful utilities

VSCodium Insiders combines the simplicity of a code editor with what developers need for the core edit-build-debug cycle.
      This is the telemetry-less version of Visual Studio Code, packaged into a Flatpak. This repackaging is not supported by Microsoft.
    

VSCodium - Insiders

STM32CubeIDE is an advanced C/C++ development platform with peripheral configuration, code generation, code compilation, and debug features for STM32 microcontrollers and microprocessors. It is based on the ECLIPSE™/CDT framework and GCC toolchain for the development, and GDB for the debugging. It allows the integration of the hundreds of existing plugins that complete the features of the ECLIPSE™ IDE.STM32CubeIDE integrates all STM32CubeMX functionalities to offer all-in-one tool experience and save installation and development time. After the selection of an empty STM32 MCU or MPU, or preconfigured microcontroller or microprocessor from the selection of a board, the project is created and initialization code generated. At any time during the development, the user can return to the initialization and configuration of the peripherals or middleware and regenerate the initialization code with no impact on the user code.STM32CubeIDE includes build and stack analyzers that provide the user with useful information about project status and memory requirements.STM32CubeIDE also includes standard and advanced debugging features including views of CPU core registers, memories, and peripheral registers, as well as live variable watch, Serial Wire Viewer interface, or fault analyzer.Note: For flashing to work properly you will need to add udev rules according to your device. If your device has an id of 0483:374b (check lsusb), you will need to create a file in /etc/udev/rules.d/ with the contents: SUBSYSTEMS=="usb", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="374b", GROUP="users", MODE="0666" and either reboot or run: sudo udevadm control --reload

STM32CubeIDE

Integrated Development Environment for STM32

CudaText is a cross-platform text editor, written in Object Pascal. It is open source project and can be used free of charge, even for business. It starts quite fast: ~0.3 sec with ~30 plugins, on Linux on CPU Intel Core i3 3GHz. It is extensible by Python add-ons: plugins, linters, code tree parsers, external tools. Syntax parser is feature-rich, based on EControl engine (though not as fast as in some competitors).
      Features
      
        Syntax highlight for lot of languages.
        Code tree: structure of functions/classes/etc, if lexer allows it.
        Code folding.
        Multi-carets and multi-selections.
        Find/Replace with regular expressions.
        Configs in JSON format. Including lexer-specific configs.
        Tabbed UI.
        Split view to primary/secondary. Split window to 2/3/4/6 groups of tabs.
        Command palette, with fuzzy matching.
        Minimap. Micromap.
        Show unprinted whitespace.
        Support for many encodings.
        Customizable hotkeys.
        Binary/Hex viewer for files of unlimited size (can show 10 Gb logs).
        Correctly saves binary files.
      
      Features for HTML/CSS coding
      
        Smart auto-completion for HTML, CSS.
        HTML tags completion with Tab-key (Snippets plugin).
        HTML color codes (#rgb, #rrggbb) underline.
        Show pictures inside editor area (jpeg/png/gif/bmp/ico).
        Show tooltip when mouse moves over picture tag, entity, color value.
      
      Features implemented as plugins
      
        Addons manager
        Find in files
        Snippets
        External tools
        Project manager
        Session manager
        Macro manager
        Spell checker
        FTP panel
        Linters support (CudaLint)
        Brackets highlight, go to pair bracket
        Highlight all occurences
        Color picker
        Insert date/time
        Formatters for HTML/ CSS/ JS/ XML/ SQL
        Tabs list in sidebar
        Create backup files
        Menu configurator
        and more...
      
    

CudaText

Open source and cross-platform text editor


      Waycheck is a simple graphical application that connects to your Wayland compositor and displays the list of Wayland protocols that it supports, along with the list of protocols that it doesn't.
    
    

Waycheck

DIY Layout Creator (DIYLC in short) is a powerful, but simple to use and intuitive tool for visualizing electronic circuit schematic and layout diagrams. It provides a simple WYSIWYG interface and supports designing PCB, vero-board, point-to-point, perf-board and guitar wiring diagrams as well as circuit schematics quickly and without the steep learning curve.In addition to drawing, the projects can be shared with other users through the integrated 'Cloud' feature. Guitar wiring diagrams can be analyzed and debugged.DIYLC is geared towards DIY hobby enthusiasts and is developed by an enthusiast with the help of the large community of DIY builders.

DIY Layout Creator

Circuit layout design tool supporting PCB, vero-board, point-to-point, perf-board and guitar wiring diagrams

BlueJ is an education-focused interactive Java IDE. It provides a basic debugger and GUI-based method calling.

Developer Tools