Read, write and edit metadata
Perl library and command-line application for reading, writing and editing meta information (EXIF, IPTC, XMP, and more) in a wide variety of file formats (JPEG, TIFF, PNG, PDF, RAW, and more).
A fast, unobtrusive and modern cross-platform GUI toolkit. Agar fully exploits hardware acceleration where available, but also supports simple frame-buffer interfaces. Agar is stand-alone and easily portable to new platforms and graphics systems.
AstroCam is an C based daemon process for Linux and BSD to control stepmotors via SMC 800 cards. AstroCam also includes both, an PHP-based WebInterface and one based on Perl, for remote Stepengine control. You can control webcams with it.