Make a 4HP 3U module fit into 1U. Or 2x 2HP into 1U. Suitable for Intellijel and Pulp Logic rails. 26HP noisyfruitslab.com 

PSSV became ACTV 10x voltage source or attenuator for desktop & eurorack. Available in two versions (passive & powered) noisyfruitslab.com 

more than just an 8 step sequencer  

simple and effective tuning of analog synths with oscilloscope 

will make LAN parties great again :)