KegTracker is a GTK+-based MOD editor for Linux distributed under the terms of the GPL. It uses a modified version of the xmp library by Claudio Matsuoka and Hipolito Carraro Jr. KegTracker and can play all music modules supported by xmp, which is just about everything except Impulse Tracker modules. Its graphical interface includes Track Display, Order Display, Instrument and Sample Display, as well as basic controls you'd expect in a tracker. It also features a cool starfield about box by Rasterman.
XMLDB uses an RDBMS to persist arbitrary XML documents. Due to its storage mechanism, searching for and recalling documents is extremely quick. You can also perform XSL translation on documents with surprising speed. The library can be used in any program to store libxml2 documents. A PHP module is also included, making XMLDB into a complete three-tier Web application development suite.