MATRIXSYNTH

Syntecno Teebee MKIII

via this auction
TB-303 clone. Some samples at the auction and here. click the image.

roland system 100m & korg SQ10 sequencer

YouTube via markoor
"a dubble sequence from a roland 100m using a korg SQ10 sequencer

the unit is been used with it's filters only , no waveforms are been used"

ARP 2500 sequencer feeding a EMS VCS3 a tb303 alike sequence

YouTube via markoor
"a nasty sequence made with a ARP 2500 sequencer and the EMS VCS3 sound. sounds very simular to a TB303, even it got a slide alike effect in it"

ETI 4600 international synthesizer

YouTube via scienceforce

"This is the ETI 4600 intarnational synthesizer, structure based on Matrix patch panel like EMS VCS-3, AKS.
There are two different ETI 4600 versions: one blackface and the other extremly rare Silver face!
Sound like Space Odyssey ;-)"

mobilesynth - Open Source iPhone Synth

"mobilesynth is an open source classic monophonic synthesizer, designed for live performance. Developers are encouraged to visit the website and contribute.

Features
* Monophonic, playing one note at a time like a class synthesizer
* Oscillator Module
o Dual oscillators
o Square, Triangle, Sawtooth, Reverse Sawtooth waves
o Octave selector, supporting 5 octaves
o Glide between notes (Lag Processor)
o Oscillator fine tine (more than one full octave)
o Oscillator sync
* Low Pass Filter Module
* Modulation module
o Tremelo/Wave
o Vibrato/Pitch
o Filter
* Envelope Generator module
o Supports ADSR (Attack, Decay, Sustain, Release)
o Volume
o Filter (amount of low pass filter) "

available on iTunes here

Note mobilesynth is from Google developer, allen.porter who lists the following:
Project Ownership:
arpspyx
iphonedisk
mobileterminal
thebends
open-tracker
itone
openloop
mobilesynth
Project Membership: iphone-dev

Sexual Healing by Romain Salgues

YouTube via coltrane14. Note the iTouch with iTouch MIDI.
"Sexual Healing-Marvin Gaye by romain salgues on clavia nord stage , clavia nord lead 2x and itouchmidi :)"

I'm guessing that's iTM Matrix here:

You can search for iTM in iTunes for more.

E-Mu Proteus 1-xr heaven patch

YouTube via hilltree
"Nice ambient piano and strings patch on the e-mu proteus 1xr
more at www.groenewoudnet.nl"

Stone Oakvalley's Authentic SID Collection (SOASC=)

Chiptune heaven

Chiptune Compilation IX
YouTube via xxxogchris
"All tracks downloaded from: http://soasc.dirtcellar.net/"

RC CIRCUIT BENT ANALOGUE DUB SIREN MINI SYNTH

YouTube via djwidow420. Reggae and delay come in at 1:36.
"custom built dub siren by resonance circuits.Hear dry with no fx and then through a vintage delay unit along to some classic studio one dub reggae"