FreeCAD is an open-source parametric 3D modeler made primarily to design real-life objects of any size. Parametric modeling allows you to easily modify your design by going back into your model history and changing its parameters. It is designed to fit a wide range of uses including product design, mechanical engineering, architecture and 3D printing.FreeCAD allows you to sketch geometry constrained 2D shapes and use them as a base to build other objects. It contains many components to adjust dimensions or extract design details from 3D models to create high quality production-ready drawings. it is a multiplatfom (Windows, Mac and Linux), highly customizable using the Python language. It reads and writes to many open file formats such as STEP, IGES, STL, SVG, DXF, OBJ, IFC, DAE and many others, making it possible to seamlessly integrate it into your workflow.FreeCAD includes a modern Finite Element Analysis (FEA) tools, experimental CFD, BIM, Geodata workbenches, a Path (CNC) workbench, a robot simulation module that allows you to study robot movements and many more, and a rich collection of plugins and macros installable directly from within the application.

FreeCAD

Anki is a program which makes remembering things easy. Because it's a lot more efficient than traditional study methods, you can either greatly decrease your time spent studying, or greatly increase the amount you learn.
      Anyone who needs to remember things in their daily life can benefit from Anki. Since it is content-agnostic and supports images, audio, videos and scientific markup (via LaTeX), the possibilities are endless.
      Optional LaTeX support is provided by the TeX Live Flatpak extension org.freedesktop.Sdk.Extension.texlive.
    

Anki


      Rnote is a vector-based drawing app for sketching, handwritten notes and to annotate documents
      and pictures.
    
      
      Disclaimer: The file format is still unstable. It might change and break compatibility between
      versions.
    
    

Rnote

Discover Math with GeoGebra. Solve equations, graph functions, create constructions, analyze data, explore 3D math!

GeoGebra

Stellarium renders 3D photo-realistic skies in real time with OpenGL. It displays stars, constellations, planets and nebulae, and has many other features including multiple panoramic landscapes, fog, light pollution simulation and a built-in scripting engine.
      Stellarium comes with a star catalogue of about 600 thousand stars and it is possible to download extra catalogues with up to 210 million stars.
      Stellarium has multiple sky cultures - see the constellations from the traditions of Polynesian, Inuit, Navajo, Korean, Lakota, Egyptian and Chinese astronomers, as well as the traditional Western constellations.
      It is also possible to visit other planets in the solar system - see what the sky looked like to the Apollo astronauts, or what the rings of Saturn looks like from Titan.
    

Stellarium

GCompris is a high quality educational software suite, including a large number of activities for children aged 2 to 10.
      Some of the activities are game orientated, but nonetheless
    still educational.
      Below you can find a list of categories with some of the
    activities available in that category.
      
        computer discovery: keyboard, mouse, different mouse gestures, ...
        arithmetic: table memory, enumeration, mirror image, balance
    the scale, change giving, ...
        science: the canal lock, color mixing, gravity concept, ...
        games: memory, connect 4, tic tac toe, sudoku, hanoi tower, ...
        reading: reading practice, ...
        other: learn to tell time, the braille system, maze, music
    instruments, ...
      
      Currently GCompris offers in excess of 100 activities and more
    are being developed. GCompris is free software, that means that
    you can adapt it to your own needs, improve it and, most
    importantly, share it with children everywhere.
    

GCompris

Multi-Activity Educational game for children 2 to 10

QGIS is a user friendly Open Source Geographic Information System (GIS) licensed under the GNU General Public License. QGIS is an official project of the Open Source Geospatial Foundation (OSGeo). It runs on Linux, Unix, Mac OSX, Windows and Android and supports numerous vector, raster, and database formats and functionalities.
    

QGIS Desktop

OpenBoard is an open source cross-platform teaching software for interactive whiteboard designed primarily for use in schools and universities. It can be used both with interactive whiteboards or in a dual-screen setup with a pen-tablet display and a beamer.
    

OpenBoard

Interactive whiteboard for schools and universities

Minuet is an application for music education. It features a set of ear training exercises regarding intervals, chords, scales and more.
    

Minuet

Kolibri makes high quality education technology available in low-resource communities such as rural schools, refugee camps, orphanages, non-formal school systems, and prison systems. Running on a wide variety of hardware, it enables offline access to a rich set of content and tools to support learners, coaches, and administrators.

Kolibri

Ideas Grow on Trees.
      Xmind is a full-featured mind mapping and brainstorming app. Like a Swiss Army Knife for your brain, spark creativity and improve thinking skills. 100+ million installations on the planet.
    

Xmind (2024)


      Organic Maps is a free Android &amp; iOS offline maps app for travelers,
      tourists, hikers, drivers and cyclists.
      It uses crowd-sourced OpenStreetMap data and is developed with love by
      MapsWithMe (MapsMe) founders and our community.
      No ads, no tracking, no data collection, no crapware.
      Your donations and positive reviews motivate and inspire us, thanks ❤️!
    
      ## Features
      
      The Linux version of Organic Maps has not reached feature parity
      with the Android and iPhone versions yet, and has not been optimized
      for mobile devices yet.
      Organic Maps is the ultimate companion app for travelers, tourists,
      hikers, and cyclists:
    
      
        
        Detailed offline maps with places that don't exist on other maps,
        thanks to OpenStreetMap
      
        Cycling routes, hiking trails, and walking paths
        Contour lines, elevation profiles, peaks, and slopes
        Turn-by-turn walking, cycling, and car navigation with voice guidance
        Fast offline search on the map
        Bookmarks and tracks export and import in KML, KMZ, GPX formats
        Dark Mode to protect your eyes
        Countries and regions don't take a lot of space
        Free and open-source
      
      ## Why Organic?
      Organic Maps is pure and organic, made with love:
      
        Respects your privacy
        Saves your battery
        No unexpected mobile data charges
      
      Organic Maps app is free from trackers and other bad stuff:
      
        No ads
        No tracking
        No data collection
        No phoning home
        No annoying registration
        No mandatory tutorials
        No noisy email spam
        No push notifications
        No crapware
        N̶o̶ ̶p̶e̶s̶t̶i̶c̶i̶d̶e̶s̶  Purely organic!
      
      The application is verified by Exodus Privacy Project.
      Organic Maps doesn't request excessive permissions to spy on you.
      At Organic Maps, we believe that privacy is a fundamental human right:
      
        Organic Maps is an indie community-driven open-source project
        We protect your privacy from Big Tech's prying eyes
        Stay safe no matter wherever you are
      
      
      Reject surveillance - embrace your freedom.
      Give Organic Maps a try!
    
    

Organic Maps

Thonny is a simple Python IDE with features useful for learning programming.
    It comes with a debugger which is able to visualize all the conceptual steps
    taken to run a Python program (executing statements, evaluating expressions,
    maintaining the call stack). There is a GUI for installing 3rd party packages
    and special mode for learning about references.
      See the homepage for more information, screenshots and a walk-through video.
    

Thonny


      Notesnook is a free (as in speech) &amp; open source note taking app
      focused on user privacy &amp; ease of use. To ensure zero knowledge
      principles, Notesnook encrypts everything on your device using
      XChaCha20-Poly1305 &amp; Argon2.
    
      
      Notesnook is our proof that privacy does not (always) have to come at the
      cost of convenience. Our goal is to provide users peace of mind &amp; 100%
      confidence that their notes are safe and secure. Our decision to go fully
      open source is one of the most crucial steps towards that.
    
      
      Notesnook is a user focused note taking tool meant to offer a fully
      end-to-end encrypted note taking experience for everyone. This includes
      the majority of our less tech savy users who just want to take notes
      without all the hassle.
    
      
      In short, Notesnook aims to offer a complete replacement for other
      insecure note taking tools like Evernote &amp; Notion. Because let's be
      honest, these tools offer great productivity but at a great cost to your
      privacy.
    
    

Notesnook

A fully open source & end-to-end encrypted note taking alternative to Evernote


      GNU Octave is a high-level interpreted language, primarily intended for
      numerical computations. It provides capabilities for the numerical
      solution of linear and nonlinear problems, and for performing other
      numerical experiments. It also provides extensive graphics capabilities
      for data visualization and manipulation. Octave is normally used through
      its interactive command line interface, but it can also be used to write
      non-interactive programs. The Octave language is quite similar to
      Matlab so that most programs are easily portable.
    
      
      Octave has extensive tools for solving common numerical linear algebra
      problems, finding the roots of nonlinear equations, integrating ordinary
      functions, manipulating polynomials, and integrating ordinary
      differential and differential-algebraic equations. It is easily
      extensible and customizable via user-defined functions written in
      Octave's own language, or using dynamically loaded modules written in
      C++, C, Fortran, or other languages.
    
    

GNU Octave

Interactive programming environment for numerical computations


            Koodo Reader is an all-in-one ebook reader that can help you better manage and study
            your ebooks. It's free and open-source.
        
      
        Extensive formats support
        Save your data to Dropbox or Webdav
        Customize the source folder and synchronize among multiple devices using OneDrive,
                iCloud, Dropbox, etc.
        Single-column, two-column, or continuous scrolling layouts
        Text-to-speech, translation, progress slider, touch screen support, batch import
        Add bookmarks, notes, highlights to your books
        Adjust font size, font family, line-spacing, paragraph spacing, background color,
                text color, margins, and brightness
        Night mode and theme color
        Text highlight, underline, boldness, italics and shadow
      
    

Koodo Reader

An unofficial desktop wrapper for the world’s most-used education webapp! Duolingo is the fun, free app for learning 35+ languages through quick, bite-sized lessons. Practice speaking, reading, listening, and writing to build your vocabulary and grammar skills.
    

DL: language lessons

Unofficial desktop client for the language-learning app Duolingo

Money Manager Ex (MMEX) is a free/libre, open-source, cross-platform, easy-to-use personal financial and money management software. It helps organize finances and track cash flow.MMEX includes all the basic features that 90% of users would want to see in a personal finance application. The design goals are to concentrate on simplicity and user-friendliness – an application that can be used everyday.

MMEX Money Manager

LeoCAD is a CAD program for creating virtual LEGO models. It's available for free under the GNU Public License v2 and works on the Windows, Linux and macOS Operating Systems.
    

LeoCAD

Design virtual models you can build with LEGO bricks

KStars is freely licensed, open source, cross-platform Astronomy Software by KDE.It provides an accurate graphical simulation of the night sky, from any location on Earth, at any date and time. The display includes up to 100 million stars, 13,000 deep-sky objects,all 8 planets, the Sun and Moon, and thousands of comets, asteroids, supernovae, and satellites.For students and teachers, it supports adjustable simulation speeds in order to view phenomena that happen over long timescales, the KStars Astrocalculator to predict conjunctions, and many common astronomical calculations.For the amateur astronomer, it provides an observation planner, a sky calendar tool, and an FOV editor to calculate field of view of equipment and display them. Find out interesting objects in the "What's up Tonight" tool, plot altitude vs. time graphs for any object, print high-quality sky charts, and gain access to lots of information and resources to help you explore the universe!Included with KStars is Ekos astrophotography suite, a complete astrophotography solution that can control all INDI devices including numerous telescopes, CCDs, DSLRs, focusers, filters, and a lot more. Ekos supports highly accurate tracking using online and offline astrometry solver, autofocus and autoguiding capabilities, and capture of single or multiple images using the powerful built in sequence manager.Astronomical Catalogs:Default catalog consisting of stars to magnitude 8Extra catalogs consisting of 100 million stars to magnitude 16Downloadable catalogs including Messier Images, Abell Planetary Nebulae, Sharpless Catalog, Lynds Dark Nebula CatalogCorrections for precession, nutation and atmospheric refractionTools for retrieval of data from online databases

KStars


        Librum is an application designed to make reading enjoyable and straightforward for everyone.
    
      
        It's not just an e-book reader. With Librum, you can manage your own online library and access it from any device, anytime, anywhere. It supports all common book formats (pdf, epub and many more), offers different themes and many other features while offering customization to make it as personal as you want!
    
    

Librum

A modern e-book reader and library manager


	    How was that chord played, again? Fretboard lets you find guitar chords
	    by typing their names or plotting them on an interactive guitar neck.
      When you have identified a chord, you can experiment with changing it,
      see more ways to play it, or bookmark it to save it for later. No matter
      if you are a beginner or an advanced guitarist, you can use Fretboard to
      practice, learn, and master your favorite songs!
	  
      
      Fretboard is proudly part of GNOME Circle, an initiative that champions the great software that is available for the GNOME platform. For more information, visit the GNOME Circle website.
    
    

Fretboard


      Tux Paint is a free, award-winning drawing program for children ages 3 to
      12.
      Tux Paint is used in schools around the world as a computer literacy
      drawing activity.
      It combines an easy-to-use interface, fun sound effects, and an
      encouraging cartoon mascot who guides children as they use the program.
    
      
      Kids are presented with a blank canvas and a variety of drawing tools to
      help them be creative.
    
    

Tux Paint

Current weather, with information about temperature, pressure, wind speed and wind direction, sunrise and sunset. Know meteorologic predictions to next hours and days. Show awesome maps with all the information. Switch between some maps distributors. Now with System Tray Indicator, showing your location and forecast.Other features:Forecast for next 18 hoursForecast for next five daysChoose your units from metric, imperial or british systemsChoose your city with popup mapsWatch awesome maps with weather information

Meteo

Know the forecast of the next hours and days with data and maps at any city all around the world

Picasso? Van Gogh? You can be any of them! Just let the artist inside you free. Transform images in your mind to beautiful paintings.
    

Paint


      SimulIDE is a simple real time electronic circuit simulator, intended for hobbyist or students to learn and experiment with analog and digital electronic circuits and microcontrollers. It supports PIC, AVR , Arduino and other MCUs and MPUs.
    
      
      Simulation speed is one of the most relevant characteristics of this simulator. It has been deeply optimized to achieve excellent speeds and low cpu usage.
    
      
      SimulIDE also features a code Editor and Debugger for Arduino, GcBasic, PIC asm, AVR asm and others. It is possible to write, compile and do basic debugging with breakpoints, watch registers and global variables.
    
      Features:
      
        Analog and Digital components
        Microcontrollers
        Code Editor
        Debugger
        Subcircuits
        DIP/Logic Symbols
        Circuit Animation
        Basic Shapes
        Oscilloscope
        Logic Analyzer
        Serial Port Connection
        Serial Monitor
      
    

SimulIDE

BibleTime is a completely free Bible study program, built for Linux, Windows, FreeBSD and Mac OS X. BibleTime contains over 400 free Bible texts, commentaries, dictionaries and books, provided by the Crosswire Bible Society.

BibleTime

Graphs is a simple, yet powerful tool that allows you to plot and manipulate your data with ease. New data can be imported from a wide variety of filetypes, or generated by equation. All data can be manipulated using a variety of operations such as the ability to select, cut, translate, multiply, center and smoothen data, as well as apply any custom transformations on the data.Moreover, Graphs supports curve fitting on imported data and offers extensive customization options for the style of the plots. You can fine-tune and personalize stylesheets to your liking.Graphs is an excellent fit for both plotting and data manipulation. The plots created with Graphs can be saved in a variety of formats suitable for sharing and presenting to a wide audience, such as in a scientific publication or presentations. Additionally, the option to save plots as vector images allows for easy editing in software like Inkscape for further refinement. Graphs is written with the GNOME environment in mind, but should be suitable for any other desktop environment as well.For any feedback, questions or general issues, please file an issue on the GitLab page.

Graphs

With the Mendeley Reference Manager, you can easily organize and search your personal library, annotate documents and cite as you write. Import papers and other documents from your desktop, your existing libraries or websites with ease. Mendeley automatically captures information like authors, title and publisher, which makes organization and browsing easy.Over 6 million researchers trust Mendeley to share ideas, see what’s new in their field and discuss important developments. Discover new connections by searching for people on Mendeley and finding researchers with similar interests via Public Groups. You can also follow new people from suggestions in your Mendeley feed.

Mendeley

Mendeley is a free reference manager and an academic social network

qFlipper is completely open source and based on Qt framework. Runs on Windows, macOS, Linux.FeaturesUpdate Flipper's firmware and supplemental data with a press of one buttonRepair a broken firmware installationStream Flipper's display and control it remotelyInstall firmware from a `.dfu` fileBackup and restore settings, progress and pairing dataAutomatic self-update featureCommand line interface

qFlipper

Graphical desktop application for updating Flipper Zero firmware via PC

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