Cynthiune is a free software, romantic and extensible music player for GNUstep and Mac OS X. Similar in look and feel to XMMS, it can read the most-known sound file formats: MP3, Ogg, FLAC, Mod, XM, AIFF, WAV and many more...

Qt Mplayer front-end, with basic features like playing videos, DVDs, and VCDs to more advanced features like support for MPlayer filters and more. One of the most interesting features of SMPlayer: it remembers the settings of all files you play. So you start to watch a movie but you have to leave... don't worry, when you open that movie again it will resume at the same point you left it, and with the same settings: audio track, subtitles, volume...

This tool can read multiple dictionaries at the same time and provides a search facility supporting the X11 cut-and-paste buffer.

GNOME MDB viewer is a graphical interface that allows one to export data and schema from so-called JET database files. (These files are more commonly known as MDB files for their filename extension, or Access Databases after the name of the Microsoft application that uses JET as its native embedded database format)

These tools help controlling loudness of audio material aimed primarily for broadcasting, but they can be useful in other situation.