The BRL-CAD libraries are designed primarily for the geometric modeler who also wants to play with software and design custom tools.

Each library is designed for a specific purpose: creating, editing, and raytracing geometry, and image handling. The application side of BRL-CAD also offers a number of tools and utilities that are primarily concerned with geometric conversion, interrogation, image format conversion, and command-line-oriented image manipulation.

For an in-depth tutorial of how to get up and running with insight3d, check out this PDF file. (Note it’s a heavy file and may require some download time. Please be patient!)

It shares all GIMP’s advantages, including the long feature list and customisability, while addressing some common criticisms regarding the program’s interface: GIMPshop modifies the menu structure to closely match Photoshop’s, adjusts the program’s terminology to match Adobe’s, and, in the Windows version, uses a plugin called ‘Deweirdifier’ to combine the application’s numerous windows in a similar manner to the MDI system used by most Windows graphics packages. While GIMPshop does not support Photoshop plugins, all GIMP’s own plugins, filters, brushes, etc. remain available.

Its key features include the following:

- Drawing Tools: Pinta includes all the common tools you expect like Brushes, Pencil, Shapes, Eraser, and Selections.

- Multiple Layers: Pinta supports unlimited layers.

- Full History: Pinta provides unlimited levels of Undo/Redo.

- Adjustments and Effects: Pinta includes a a wide array of adjustments and effects for tweaking your images.

Shotwell includes the following features:

- Import photos and videos directly from a digital camera.
- Automatically group photos and videos by date.
- Support tagging.
- Editing features allow users to rotate, crop, eliminate red eye, and adjust levels and color balance.
- Includes auto “enhance” option that will attempt to guess appropriate levels for the image.
- Allows users to publish their images and videos to Facebook, Flickr, Picasa Web Albums, and YouTube.

The software is unique in its ability to animate subject and background in real-time, making continuous interaction possible. This also means that physical sensors, cameras or other environmental variables can be attached to the animation of characters, creating a cartoon reacting to its environment.

For example, it is quite simple to create a virtual puppet band reacting to live audio input, or set up a scene of drawn characters controlled by the movement of dancers.

Creating characters in Animata is simple and and works on the basis of still images, which serve as the skeleton of the puppets, before a network of triangles is produces, some parts of which link to the character’s bone structure. The movement of the bones is based on a physical model and is therefore very fluid.

Extensions make Piwigo easily customizable. Icing on the cake, Piwigo is free and opensource.

Key features include:

- Categories. Organize your photos in your category tree, with no limit in depth.

- Tags. Describe photos and find all of them tagged with “night + Paris + John”.

- Themes and Plugins. Change appearance and add features.

- Privacy. Make your photos private and decide who can see each of them.

The project runs in the GNOME desktop environment and anyone is welcome to collaborate on it with code, translations or ideas.

It has a graphical user interface, so you can simply open a RAW file and experiment with the controls to see how they affect the image. Rawstudio has a very simple architecture which is optimized for ease of use and therefore should be intuitive to most photographers.

The normal workflow would be that you first convert your RAW files and then use an image editing application to further work on your images. Rawstudio itself is a highly specialized application for processing RAW images, not a fully featured image editing application.

Key features include:

- Intuitive GTK+ interface
- Reads all dcraw supported formats
- Internal 16bit rgb
- Color management using Little CMS
- Batch processing
- Various post-shot controls (white balance, saturation and exposure compensation among others)
- Realtime histogram
- Optimized for MMX, 3dnow! and SSE (detected runtime)
- Exposure mask, cropping, straighten
- Easy sorting of images
- XML settings cache
- Basic EXIF-reading
And much more…

Fields of painting that Krita explicitly supports are concept art, creation of comics and textures for rendering.

Modeled on existing real-world painting materials and workflows, Krita supports creative working by getting out of the way and with snappy response.