Software for image processing
An interesting list of open projects for astrophysics can be found in the Astrophysics Source Code Library.
Multiple capabilities software
Software able to do several things, generally registration and stacking at least.
Siril was meant to be Iris for Linux. The new version 0.9 has been released, more oriented into graphical interaction than command line as old versions used to be. It has been updated to work with GTK+-3.6 and all modern systems libraries.
Website. Lxnstack is a program designed to align and stack astronomical images (both planetary and deep-sky). Python/Qt made for Linux-based systems.
Noteworthy features are the sub-pixel alignment and the ability to generate light curves.
GIMP astronomy plugins
These plug-ins for Gimp intend to be useful for astronomical image processing. They implement all basic functions for astronomy image processing, for GIMP's 8-bit images.
Single capability software
Software developped for one main capability.
Focus Helper for Astrophotography
astrofocuser is a very simple tool written with Qt 4.5 to help star focusing in astrophotogaphy. This tool applies an FWHM by transparency on the background window.
AVI file frame selector
AstroAviBrowser is a tool for astronomy imaging capture/processing. With AstroAviBrowser, you may open a video file, select the good frames and save the new sequence in a new AVI file. It also debayers your raw sequences.
Revision 101 fixes the dependency against recent versions of libavifile.