
      Pure Data (or just "Pd") is an open source visual programming language for multimedia. Pure Data is developed by Miller Puckette since 1996 and you can find it on his official website along with the official documentation and other related resources. This is the official "Pd" or "main distribution" and it is also known as "Pd Vanilla".
    
      
      Think of Pd as a &lt;em&gt;Modular Synthesizer&lt;/em&gt; that is also a programming language.
    
      
      Pd's audio and MIDI functions are built-in as well as networking (e.g. using Open Sound Control), but there are a number of external libraries that allow you to do graphics, interface hardware and much more...
    
    

Pure Data (Pd)

A real-time graphical programming environment for live interactive computer music

Material Maker is a tool that can be used to create textures procedurally and paint 3D models.

Material Maker

Procedural texture generation and mesh painting tool

PreviewQt is a very simple application for previewing a wide range of files. Its main aim is on speed, striving to provide a preview as instantaneously as possible. It achieves this by being very lightweight and by its ability to sit in the system tray, ready to show whatever is thrown at it.
      Supported file formats include:
      
        More than 140 image formats
        All of the common video formats
        Photo spheres and 360 degree panoramas (that use equirectangular projections)
        Motion photos, Micro videos, and Apple live photos
        PDF documents including page navigation
        Archives (zip, tar.gz, rar, 7-zip) with the ability to explore its content
        Comic Books (cbz, cbt, cbr, cb7) including page navigation
      
      It is also possible to set up an external application for the categories of files. With a shortcut or button it is possible to pass a previewed file on to the provided external application for further processing.
      You can pass files to PreviewQt by means of a remote application (small square) wth any file dropped on it passed on to PreviewQt. If you are running KDE Plasma 6, there is also a plasmoid that integrates nicely with your desktop.
      If you like the overall concept of PreviewQt but would like to have more features, check out the fully featured image viewer PhotoQt.
    

PreviewQt

Play with friends online to defend the planet! Longest time to first impact or longest time to 100% damage. You destroy asteroids by flying into them before they hit the planet!
      
        Escape to free mouse lock.
        Use W,A,S,D,Q,E,SPACE &amp; LEFT SHIFT to move around.
        L-CTRL / Right Click to Brake.
        L-ALT / Mouse 3/4 Click to Instant Brake.
        R = Toggle auto-tilt/roll around planet.
        Q+E to stop rolling.
        F = FPS to console.
      
    

AstroImpact


      An independent fork of Blender created by Porteries Tristan, aiming to clean up and improve current Blender Game Engine (BGE) code, experiment with new features, and implement forgotten features that currently exist but have not been merged with the official releases of Blender.
    
      
      UPBGE is a public, free and open-source project held together by its community. Hundreds of contributors have volunteered to make this project possible.
    
    

UPBGE

UPBGE is a free and open source 3D Game Engine integrated in Blender


      There are many ways to read comic books, and one of those that has become more
      common in recent years is on a computer. Peruse was created as a way to make
      exactly that as easy and pleasant as possible, and to simply get out of the
      way and let you read your comic books. One could say that it allows you to
      peruse your comic books at your leisure, but that would be a silly way of
      putting it - so, peruse your comic books at your leisure!
    
      
      One of the ways in which Peruse ensures your reading experience is as pleasant
      and effortless as possible is to allow you to simply pick up where you last left
      off. The welcome page in the application (first screenshot below) shows you your
      most recently read comics, and shows your progress through them. To pick up
      where you left off, simply tap the top left item and you will be taken right to
      the page you were reading before you had to stop.
    
      Features:
      
        Comic Book Archive (cbz, cbr, cb7, cbt, cba)
        Portable Document Format (pdf)
        ePub Books (epub)
        DeVice Independent files (dvi)
        DeJaVu (djvu)
        Compiled Help (chm)
      
    

Peruse


      Create 3D images with a phone or camera.
      Take two photos of a subject and the software will create a 3D image from them. Vertical and  rotational alignment of the left and right images is essential for a convincing 3D effect, but difficult to achieve with an ordinary camera. This software corrects it. 3D image formats that can be created are anaglyph (red/cyan), side-by-side and crossover. 
      Several photos can be processed at once and the resulting images reviewed.   
    
    

Popout3D

Creates 3D images from photographs taken with an ordinary camera.

Oh My SVG let you export unoptimized SVG files into smaller versions.It lets you preview and tweak the parameters to obtain a satisfactory result before saving.It removes or approximate information that is not required for rendering.Remember that Oh My SVG removes information and metadata that may be useful, do not overwrite your original/source SVG files.

Oh My SVG

KGeoTag is a standalone geotagging program. Images can be associated with geographic coordinates by different means: On the one hand, a matching with GPX encoded geodata can be done, on the other hand, the coordinates can be set manually, either via drag and drop onto a map, via bookmarks or by manually supplying them. The coordinates can be stored in the images' Exif header and/or in XMP sidecar files.

KGeoTag

jdPixelUpscaler upscales images by simply replacing one pixel with several of the same color. For example, if you set the scaling factor to 2, one pixel becomes 2x2 pixels of the same color. No attention is paid to the surrounding pixels or to transitions. For certain graphics (mainly pixel art or similar in very low resolution), this may give better results than other methods.
      Command line arguments and a D-Bus interface are provided for automation.
    

jdPixelUpscaler

Pineapple Pictures is a lightweight and easy-to-use image viewer that comes with a handy navigation thumbnail when zoom-in, and doesn't contain any image management support.
    

Pineapple Pictures

CoreImage is a lightweight app based on Qt Framework. This app is a part of C Suite.

CoreImage

A simple lightweight easy to use image viewer

Xpano is a photo stitching tool that focuses on simplicity and ease of use, major features include:Auto detection of groups of images that can be stitched into panoramasPreview + zoom + pan of the computed panoramasCrop mode, boundary auto fill, selectable projection typesExport of full resolution panoramas including exif metadata

Xpano

Image Roll is a simple and fast GTK image viewer with basic image manipulation tools. Written in rust.

Image Roll

Image viewer with basic image manipulation tools

Inspired by the famous game Run-Escape.
      All your stats are shown in the title bar. Smash presents and pots to get health drops, I would start on Zombies, Green Flies, Baby Dragons, Skulls and Whirlwinds. Check the readme on github.com/mrbid/TuxScape for more info.
      Mouse locks when you click on the window, press ESCAPE to unlock the mouse.
      
        Left Click = Attack
        Right Click = Target Weapon / Engage Jet Pack
        Mouse Scroll = Zoom in/out
        W,A,S,D / Arrow Keys = Move
        L-SHIFT / R-CTRL = Sprint/Fast
        Space = Jet Pack
        1-9 = Weapon Change
        C = Toggle between First and Third person
        V / MOUSE4 = Toggle between stickey/toggle mouse clicks (good for afk)
      
    

TuxScape

Android Virtual Pen allows to send pen input data from your android device to a pc host where it emulates a virtual pen. What distinguishes this solution from others, is emphasis on low-latency to provide the best drawing experience.
      The Android app itself can be found on the github repo at github.com/androidvirtualpen/virtualpen/releases/download/0.1/virtual-pen.apk and soon on the Google Play Store if you wish to support further development.
      Features
      
        Adjustable pen pressure threshold such that you can move the pen-cursor without triggering an unintended click/draw action
        Adjustable pen pressure sensitivity such that you can customize the force needed to be applied
        Eraser support
        Switch between stretched and fixed display mode. In stretched mode, the android device screen is stretched and completely mapped to your PC primary screen. Note that this is required to fully reach the boundaries of your PC screen from your device but causes some slight distortion if the screen ratios (android vs PC) are not the same.
In fixed mode, if the android device screen resolution fits into your PC screen, the android device display is centered and mapped on the host at a 1:1 ratio. This mode should incurr no distortion.
        Detects available usb devices and automatically save your settings for each
        Supports both X11 and Wayland
      
    

Android Virtual Pen

A comic book converter with support for .cb*, .pdf, .xps, .epub, .mobi and directories. Images can be converted to JPEG, PNG, TIFF, WEBP, AVIF, JXL or 4-Bit BMP (16 colors) file format.

CBconvert

Pixyne application has a simple and intuitive interface:- With a click on photo you can mark to drop it in the trash.- In a list view, clicking on a row button opens the corresponding photo.- In advanced mode you may set or correct the EXIF shooting date, crop and ajust photo.- Pixyne automaticaly stores the current state of the folder so you can undo changes at any time. This is useful when working with a large number of photos and when you need to close the application in order to continue working later.- Made changes will not actually be applied until you save.- When you save changes, you can change all file names to EXIF shooting date format.

pixyne

Quickly review photo folders, safely delete bad and similar shots, fix the shooting dates

Tsuki-tag is an aggregated anime imageboard browser and collection manager, which lets you browse multiple image sources in a combined view, search images using tags, download images into configured workspaces (folders) with customization and filename templating support, and manage or curate multiple collections of your chosen images.Tsuki-tag can inject EXIF metadata information (tag, image attributes, copyright notice, etc.) into the images during downloading or saving, with an additional option to convert non-JPG images to JPG images which support EXIF metadata. This could provide artists with a great way of creating and organizing a collection of images for reference, or to manage and appropriately annotate their own images with author and copyright information.Features include:Browse an aggregated collection of images retrieved from a number of pre-configured image providers in a paginated view.Fine-tune which providers are queried, along with what type of images should be shown ('safe', 'questionable', 'explicit').Search for images using tags and tag combinations with wildcard support, exclude images from being displayed using another set of tags with wildcard and regular expression support.Hover over images for a quick look at their attributes and information, or select them to keep them available for batch operations.Open images in separate tabs and continue browsing.Multi-selection system with support for batch operations (batch add to / remove from workspaces and online lists, batch update or annotate).Create online lists, which are a local collection of image metadata which can be browsed just as the online providers.Create workspaces, which on top of the features of online lists, lets you download images to configured folders with customizable behavior.Import local files or folders to workspaces, or convert one of your image folders to a workspace.Create metadata groups, which are a collection of information such as author, copyright notice, description and notes, which can be directly injected into the EXIF metadata of the JPG images files during workspace operations.Convert non-JPG images to JPG for EXIF support.Add, edit, or remove image tags before workspace or online list operations.Create tag rules for your online lists or workspaces with wildcard and regular expression support, to automatically process an image across multiple lists.Automatically add or remove tags when an image is added to, or removed from a workspace or online list, with templating support.Specify the file names of files to be downloaded to a workspace, with templating support.Global tag blacklisting with wildcard and regular expression support.Several other features such as opening images in your default image editor, opening or copying the image website URL, re-downloading the image from the original provider, and more.

Tsuki-tag

Anime imageboard browser, aggregator, downloader, tagger, converter, collection manager. Browse and create your own collections, configure workspaces for image downloads with templating support.

Filmulator accepts raw files from cameras and simulates the
   development of film as if exposed to the same light as the camera's
   sensor.
    

Filmulator

A GUI adaptation of Filmulator, a film emulator with all of the positives and none of the negatives

25 Different Enemies, 3 Weapons, GOD MODE!
      ... and two secret hidden weapons bound to two keys ;)
      Mouse locks when you click on the window, press ESCAPE to unlock the mouse.
      
        W,A,S,D / Arrow Keys = Move
        L-SHIFT / R-CTRL = Sprint
        Left Click = Shoot
        Right Click = Zoom
        Mouse Scroll = Change Weapon
      
    

Serious Shooter

Ikona is a design companion to help you design icons. It is designed to integrate with the KDE Plasma desktop.

Ikona

Ikona is a design companion to help you design icons

Scan Tailor is an interactive post-processing tool for scanned pages. It performs operations such as page splitting, deskewing, adding/removing borders, and others. You give it raw scans, and you get pages ready to be printed or assembled into a PDF or DJVU file. Scanning, optical character recognition, and assembling multi-page documents are out of scope of this project.Scan Tailor is Free Software (which is more than just freeware). It’s written in C++ with Qt and released under the General Public License version 3. We develop both Windows and GNU/Linux versions.This project started in late 2007 and by mid 2010 it reached production quality. In 2014, the original developer Joseph Artsimovich stepped aside, and Nate Craun took over as the new maintainer.Scan Tailor is being used not just by enthusiasts, but also by libraries and other institutions. A few books processed by Scan Tailor even ended up on Google Books.

Scan Tailor

Interactive post-processing tool for scanned pages

Color box to help developers and designers.
    

Coulr

You have to defeat the dragon. It takes 24 snowball hits to defeat the dragon. If Tux gets hit just once you have to start all over again! Snowballs will randomly spawn in one of the four grassy patches, Tux can only carry one at a time and cant throw a snowball unless he is standing still. Good luck!
      
        W,A,S,D / Arrow Keys = Move
        Space Bar = Throw Snowball
        C = Change camera view
      
    

Tux VS Dragon


      Ipe is a drawing editor for creating figures in PDF format. It supports making small figures for inclusion into LaTeX-documents as well as making multi-page PDF presentations.
    
    

The Wick Editor is a hybrid animation tool and coding environment, inspired by similar tools such as HyperCard, and Scratch. It's designed to be the most accessible tool for creating multimedia projects.

Wick Editor

A tool for creating games, animations and everything in-between!


      Splash is a free (as in GPL) modular mapping software. Provided that the
      user creates a 3D model with UV mapping of the projection surface, Splash
      will take care of calibrating the videoprojectors (intrinsic and extrinsic
      parameters, blending and color), and feed them with the input video
      sources. Splash can handle multiple inputs, mapped on multiple 3D models,
      and has been tested with up to eight outputs on two graphic cards. It
      currently runs on a single computer but support for multiple computers is
      planned.
    
    

Splash

With its custom import, channel packing, and automated export features,
      Bridge allows you to manage your assets in one place like never before.
      The days of manual shader setup, image conversion or sensitive folder
      structures are over; welcome to the future of asset management.
      NOTE: This wrapper is not verified by, affiliated with, or supported by Quixel.
    

Quixel Bridge

The perfect Bridge between Megascans and your favorite tools

GPS Correlate takes a GPS track stored by any of a number of GPS devices and phone apps and correlates the time stamp of a digital photo with the location of the track at that same moment. The location of the image is then stamped directly into the image file using the appropriate EXIF GPS tags. The resulting image then contains not just the time the photo was taken but its exact location, too. The location is used by various other applications and services (such as Google Photos) to display a map of where the photo was taken.
    

GPS Correlate

GPS Correlate attaches EXIF GPS location tags to images

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