The FAAC project includes the AAC encoder FAAC and decoder FAAD2. It supports several MPEG-4 object types (LC, Main, LTP, HE AAC, PS) and file formats (ADTS AAC, raw AAC, MP4), multichannel and gapless en/decoding as well as MP4 metadata tags. The codecs are compatible with standard-compliant audio applications using one or more of these profiles.
Yet Another Time Machine is a command line Ogg Vorbis and MPEG audio player with the ability to control the tempo of playback without changing the pitch. Primary usage would be to listen (for example) to audio books at 150% tempo. This is still understandable and saves time, hence the name of the program.
DJBorg turns your MP3 playlist into a personalized radio station, adding randomly-generated DJ banter between tracks. Song information (based on ID3 tags), news, weather, headlines, and witty remarks are announced via a text-to-speech engine. It is fully customizable via a rules file or Python code. It is compatible with WinAmp and other players that support the .m3u format.