OnlineSequencer.net - OnlineSequencer.net is an online music sequencer that allows users to create beats and music tracks.
FluidSynth - FluidSynth is a real-time software synthesizer based on the SoundFont 2 specifications and has...
AudioSauna - AudioSauna is a full-featured audio workstation for making music online.
VirtualMIDISynth - VirtualMIDISynth is a software MIDI synthesizer implemented as a Windows multimedia user driver...
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.
Zebralette - u-he makes creative software synthesizers and effects.