General MIDI Sequencer.
- MIDI connections (Wired and Bluetooth)
- 2 sequences (unlimited in pay version)
- 16 channels
- Transport control
- MASTER / SLAVE modes

Website: http://www.volcanomobile.net/super-midi-box/
User manual: http://www.volcanomobile.net/super-midi-box/user-manual.html
FAQ: http://www.volcanomobile.net/super-midi-box/faq.html

This application uses a modified version of FluidSynth, you can find the source code here https://github.com/VolcanoMobile/fluidsynth-android