Welcome to Rendera
Rendera is an open-source painting program. It was primarily designed with photo restoration in mind, but is also useful as a general painting application.
The tools, shapes, blending modes, edge-wrapping, and cloning may all be combined to suit a particular need. Brushstrokes are rendered after being drawn, allowing for slower, non-realtime calculations to be applied without interfering with the mouse or tablet response.
This program is written in C++ and uses the FLTK toolkit.
The Linux version must be built from source, as there are no binary packages yet. Please visit the GitHub project page for full instructions:
32-bit Windows binaries are available here: http://sourceforge.net/projects/rendera. (64-bit coming soon...)
(The Windows version may also be built from the Linux sources, see "Makefile.mingw" in the GitHub repository.)