Linux apps that run anywhere. Download an application, make it executable, and run! No need to install. Distribute your desktop Linux application in the AppImage format and win users running all common Linux distributions. Package once and run everywhere. Reach users on all major desktop distributions. http://appimage.org/
KNOSSOS visualizes large 3D (up to multiple terabyte) volume electron microscopic (e.g. Serial Block-Face EM) datasets by displaying slices. It supports skeleton and volume-based annotation modes, which can be extended by plugins written in Python.
Krita is a free sketching and painting program. It was created with the following types of art in mind: concept art, texture or matte painting, illustrations and comics.