Rendera is an open-source painting program. The tools, shapes, blenders, edge-wrapping and cloning may all be combined to suit a particular need. This program is different in that brushstrokes are computed and rendered after being drawn. Some uses for Rendera include photo restoration, colorizing, making seamless tiles, etc.

Notes: Latest source available from github. Sourceforge has a Windows port.

Operating system: Windows, Linux, Mac
Screen library: FLTK