GoatTracker - This is a crossplatform C64 music editor.
Anytune - Anytune is an application that is designed to play songs directly from your iPhone or iPad music library, helping you to adjust tempo and pitch for each song according to your taste.
OnlineSequencer.net - OnlineSequencer.net is an online music sequencer that allows users to create beats and music tracks.
BattleMe - BattleMe is a useful mobile application that enables you to compete with others in creating rap and rhythms.
Jummbox - A modified Beepbox that have more stuff then Beepbox. It can be used just like Beepbox. The features of Jummbox is the same of Beepbox's features, but Jummbox have more stuff to offer.
Audio Trimmer - The simplest way to trim your audio files