Acid Pro 7
ACID Pro 7 support multitrack recording and mixing, MIDI sequencing, etc.
Server 1 Afreecodec
It help musicians the easiest possible method for creating rhythm guitar parts.
HappyEO is a virtual instrument with your computer keyboard and mouse.
It is a MIDI sequencing program for Mac and Windows.
MusicMakerPro Polyphonic Synthesizer
The Midifile-Optimizer lets you customize your midi files.