SMPlayer is a complete media player for Windows and Linux. It uses MPlayer as a playback engine, which is capable of playing most video and audio formats (AVI, mkv, WMV, MP4, MPEG, etc.). It can also play and download YouTube videos. One of the most interesting features is that it remembers the settings of all files you play. So if you start to watch a movie but have to leave, 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, etc.
BallroomDJ is a ballroom music player. It is designed to let the computer choose the music and to be able to play music the entire evening without intervention. The choice of music is based on the choice and weighting of different dances by the user and the use of various rules to choose which dance to play next. The rules are: avoid repetition of the dance, avoid sequences of dances of similar types, avoid sequences of dances of similar speeds, and avoid sequences of dances from the same family of dance.
MoreAmp is an audio player, transcoder, and CD ripper for Mac OS X, Mac OS 9, Windows, Unix, and Linux. It plays and creates ogg, flac, mp3, aac, m4a, mp4, wav, and aif files, and plays wma files. It features a 31-band equalizer, repeat loop, variable pitch/tempo, ram or ramdisk preload, and more.