MATRIXSYNTH

X0XB0X Synthesizer

YouTube via Dazbo10. via ladyada's ranting. More info and pics here.
"During june of 2008 i built a x0xb0x,these are the closest you can get to a TB303 without it actualy being a tb303,each component inside the case is the same as the original tb303 - This was my first play after building...
I was pleased with the result."

Theremax

YouTube via PortamentoFr

"Premier fonctionnement de mon Theremax fait maison."
"Prime way my Theremax homemade."

korg poly 800 II sounds

YouTube via oldcomforter
"Me messin' around with the poly 800 II - not yet modded. I got this synth in 2007 for $100 - it was slightly battered and missing a key. Amazed at how scuzzy (in a good way) and dark about 1/4th of the sounds are. Another good portion are heavenly sounding. Hopefully soon to be modded with the moog slayer."

"Hier ist das leben" - on Yamaha and ELKA organs

YouTube via organfairy. Roland JX-8P
"Somehow this piece of German disco music just asks for a yellow one-piece suit and a silver cap! Add two organs, a synth, and some chimes and the picture is complete...."

Tenori-on with Absynth

YouTube via salzmanufaktur. "using the Bounce mode"

Tenori-on with FM8

"using the Draw mode with an arpeggiated sound"

Diabolic Song Movie

YouTube via PortamentoFr. Anyone know more about the "Diabolic Mad Synthesizer?"
"Séance de travail et d'improvisation de Bastien Lartigue sur quelques synthétiseurs analogiques : Le Diabolic Mad Synthesizer (en rouge), un CS15 et un theremin. Le rythme et les nappes sont réalisés avec un Fantom X6 Roland. (Désolé pour le manque de lumière) Le MP3 se trouve ici : www.lartigue.free.fr/diy/synthe/media/di abolic_song.mp3"
Googlish:
"Working session and improvisation Bastien Lartigue on a few analog synthesizers: Diabolic Mad Synthesizer (red), a CS15 and a theremin. The pace and ground are made with a Roland Fantom X6. (Sorry for the lack of light) The MP3 is here: www.lartigue.free.fr / diy / synthe / media / di abolic_song.mp3"

WSG 2

YouTube via PortamentoFr

"Le Weird Sound Generator est un générateur de son bizarre. C'est un instrument imaginé par MFOS. Il comporte 2 x 3 VCO et un VCF."

MFB SYNTH II

images via this auction
"The monophonic Synth 2 is the new flagship for MFB with a storeable user interface, more possibilities to play on and better quality.

The classical real analog module with voltage controlled VCOs, VCF and VCA can be run via Midi or with the internal stepsequencer. 25 Sequences with each 32 steps can be edited, combined and performed. There are 50 presets and 49 user sets to store all sound parameters.

Noise, external audio and three VCOs come together in the internal mixer where they offer a wide range of sound possibilities.

In the 24dB Lowpass filter the unit can resonate itself, be modulated from the LFO or a VCO and has a keyfollower function.

There is each one ADSR envelope for each VCA and VCF. The two LFOs with triangle, rect, saw, random can be used as one shot or as a little envelope, too.

Over Midi you can play VCF and/or VCA with dynamics. The sequencer can send or receive start, stop and clock.

It can understand CV/Gate for it's 3 oscillators, can be controlled via MIDI and has a great integrated step sequencer.

MIDI In/Out, Audio In/Out , CV/GATE In, Power (power supply included)"