There have been many discussions about alternative sequencer firmware that differs from the MBSEQ as written by TK.  So far, only the SID 303 mode has developed into a finished product.  Of the others, the vX and the beginner's 16 step have the most active work at the moment.

Here is an attempt to summarise and collate those discussions.

[[http://www.midibox.org/forum/index.php?topic=2231.0|Strictly MIOS alternative sequencer thread]] - a summary of ideas to mid-2004\\
[[http://www.midibox.org/forum/index.php?topic=6067.0|An 8 step sequencer]] - using TTL components and no PIC\\
[[http://www.midibox.org/forum/index.php?topic=4179.0|MS-DOS/Linux sequenzer for old Laptop?]]\\
[[http://www.midibox.org/forum/index.php?topic=2111.0|supersequencer?]] - diverged into DOS/Linux on SFF hardware discussion\\
[[midibox_sequencer_vx|Sequencer vX]] - stryd_one's MIOS algorhythmic pattern sequencer\\
[[http://www.midibox.org/forum/index.php?topic=5779.0|MIOS Beginner's 16 step seq project]] - xOx style, MIOS code\\
[[trsequencer]] - summarise the features of the classic Roland TR style drum sequencer with intention to reproduce in MIOS\\
[[http://www.midibox.org/forum/index.php?topic=3909.0||Tap in a sequence?]] - tap tempo in the SEQ or with an external CORE\\

The MIDIBox SID also contains a wavetable sequencer, which can be used as an [[http://www.ucapps.de/howto_sid_wavetables_3.html|arpeggiator]], or in [[http://www.ucapps.de/howto_sid_bassline.html|303 mode]] as a 3 track, 32 step sequencer.  Use of the sequencer requires either JSynthLib or the [[http://www.midibox.org/forum/index.php?topic=5680.0|303 control extension]] and the alternative v1.7303 firmware. 

The [[http://www.ucapps.de/midibox_fm.html|MIDIBox FM]] also contains the 3x32 wavetable sequencer