From bottom left left to top right (clockwise):
Numark X6 analog DJ mixer - this is my main for 2xLSDJ + computer output
Pioneer HDJ 500 headphones - sound good, feel great. Not perfect, but good for a budget production/DJ setup
Traktor Z1 USB Mixer/ Sound card - handles all of my PC-related audio
MIDI FIghter Pro - this hoss can do just about anything - quick note entry in Ableton, beat making, sequencing, it's awesome
MIDI FIghter Classic - soon t obe replaced with another Pro model, being sold to Tri Angles
Arduinoboy (courtesy of Alley Beach) - supports up to 4 Gameboys (2 DMG 2 GBP-AGS) at once, powered by USB
Clear Japanese GBC (frontlit, internal prosound) from Mikee Teevee
Gold Gameboy Light with external prosound jack
Clear, Green, and Purple ASM carts as well as 2 MGB (channels 1-5 and 6-11?) carts by Jazz :3
Stock NES with Chipmaestro cartridge
Bleh laptop and meh speakers
$3 USB 2.0 hub powering USB-MIDI Adapters, cart flasher, USB MIDI Keyboard (mouse and keyboard have their own USB port on the lappy)
Silver GB Micro, AGS 101, EZ Flash IV, 2 custom-made GBC's by my girlfriend featuring Batman and Superman comics plastered on, pretty slick.
Kimball Swinger 300 house organ, it's all electric, has its own tube amp, and it's pretty freaking awesome. Got it for $90 at a Goodwill in Georgia. On top of it next to the USB hub is my cart flasher from Jazz as well as the actual USB MIDI keyboard I use.
That's it, for now.