Sony

Bootweb Modchips
Sells PS2 mod chips, Gameboy Advance flash cards and other accessories. Located in New Zealand.
http://www.bootweb.com/

Cellular Center
Sells mod chips for Playstation and PS2 consoles. Also offers programmers and other accessories.
http://www.cellularcenter.it/

Console24.com
Offers PS2 and Psone mod chips and accessories. Includes Forum, FAQs and affiliate program.
http://www.console24.com/

Mod Chip Outlet
Mod Chips and game enhancers.
http://www.modchipoutlet.com/

Mod-Chip.com
Offers Playstation and Playstation 2 mod chips. Also offers Gamecube Freeloader to allow play of import games.
http://www.mod-chip.com/

Modchip.com
Offers Playstation, PS2 and Xbox mod chips.
http://www.modchip.com/

Modchipinc.com
Offer Playstation and Dreamcast mod chips, installation services, and pictures.
http://www.modchipinc.com/

Modchips Etc.
Offers mod chips and accessories for Playstation and PS2. Located in Australia.
http://www.tcfb.com/modchips/index.html

ModChipStore.com
Sells mod chips for Playstation 2, Xbox, Playstation and other consoles. Provides installation services as well as pre-modified consoles. Features tutorials and FAQs.
http://www.modchipstore.com/

ModMonster
Offers Playstation, Xbox and Gameboy modchips and accessories. Also sells related PC software.
http://www.modmonster.com/

Modz.co.nz
New Zealand supplier of PS2 mod chips. Also offers installation services.
http://www.modz.co.nz/

Playstation Premodds
Sells Premodded PS2 and PS1 consoles with color cases.
http://www.premodds.com

Playstationenhancer.com
Information on using backups with a game enhancer.
http://sadbuttru.tripod.com/

PSX Game World
Sells Playstation and PS2 modchips and accessories. Also offers pre-modified consoles.
http://www.psxgameworld.co.za

Psxtune
Playstation and Playstation 2 Modchips imported from Asia.
http://www.psxtune.com/

Slide-card.com
Offers an alternative to PS2 modchips. Allows play of PS2 CD-R and DVD-R backups as well as original import games.
http://www.slide-card.com/

X-tremz.com
Offers PS1 and PS2 mod chips, parts and accessories. Located in France.
http://x-tremz.com/