Since most of my work is macro photography most of my equipment is for that purpose. In macro photography you don't need large studio or various backgrounds (since everything except for the subject is blurred anyway). In addition, some of my work takes place at the field, so nature provides me the studio, and all I need is to carry my heavy equipment bag to an interesting location and "burn some film".

Here is an example of a setup for shooting the eyes of a tarantula:

Here is some draft list of the photographic equipment I have:

Digital Cameras:
Nikon D800 Digital SLR Camera
Nikon D100 Digital SLR Camera
Canon PowerShot SX230 HS

Flash lights:
Nikon SB-400 Speedlight
Nikon SB-80DX Speedlight
Nikon SB-29s Macro Speedlight

Lenses:
50mm f/1.8D AF Nikkor Lens
28-105mm f/3.5-4.5D AF Zoom-Nikkor Lens
Sigma - Zoom Telephoto Lens 100-300mm f/4.5-6.7 DL Autofocus Lens for Nikon AF-D
Telephoto AF Micro Nikkor 200mm f/4.0D ED-IF Autofocus Lens
Zoom Super Wide Angle AF 12-24mm f/4G ED-IF DX AF-S Nikkor Autofocus Lens

Nikon camera and lens accessories:
PK-11A Extension Tube
PK-12 Extension Tube
PK-13 Extension Tube
PN-11 Extension Ring
BR-2A Lens Reversing Ring
BR-5 Mount Adapter Ring
BR-3 Mount Adapter Ring
BR-6 Auto Diaphragm Ring for Reverse Mount Lenses
SC-17 TTL Sync Extension Cord
SU-4 Wireless Slave Flash Controller
SC-19 TTL Multi Flash Cord
AS-10 TTL Multi Flash Adapter
PB6 Bellows
PB-6E Extension Bellows
PB-6M Macro Copy Stand
PG-2 Camera Focusing Stage
AR-7 Mechanical Double Cable Release
AR-10 Double Cable Release
AR-3 Threaded Cable Release
MC-25 Adapter Cord

Other accessories:
Lowepro Pro Trekker AW II, Backpack