The PSXSDK is a free and open source software development kit that enables anyone with C programming knowledge to make programs and games for Sony's PlayStation console. Everything was either written from scratch or based on already available open source resources. It is thus free from any proprietary code and fully legal to use. The SDK is mostly geared towards a *nix environment, but is fully usable with emulation environments such as MSYS and Cygwin.
DerMixD is an audio mixing and network-listening daemon that is similar to mixplayd but quite different in its implementation. It supports the playing of music files on a run-time configurable number of input channels, mixing them together and producing output on a run-time configurable number of output channels. It is controlled over a UNIX domain or TCP socket and supports scripting, gapless playing of tracks, including filtering of null samples from padding, use of mpg123's simple equalizer or a range of effects (mainly via LADSPA), flexible input/output connection, changing playback speed, and more.
Gsecraif is a tool for splitting and recombining files in a secure manner. It addresses two aspects of security: protecting against data loss and guarding against unauthorised access. It splits a file into three or more equal sized parts (component files), up to a maximum of 255. The utility can recover the original file even if one of the component files is lost. It uses XOR (RAID 5) technology. None of the component files contain any data from the original file. It can split any kind of file and uses no encryption.