Anushri - DIY synth from Mutable Instruments.

This was the first synth that I built myself.  I'd say I took on a bit more than I could chew with this one never having built anything of this magnitude before, but it's done, and it works, and it sounds magnificent.

Available as a DIY kit from Mutable Instruments.  It has great step-by-step instructions for building it on their website.  Well worth a go I reckon.

Here's someone else's page with a timelapse video showing them building theirs.

Building it as a synth not a Modular jobby?  Then you'll need a power supply.  Here's all the details on what's required.

Here's the MuffWigglers forum page all about it.

Here's the cheat-sheet showing what all the buttons do.