I've tried to make a list of all the home computers for which cartridges (or cards) with games were released. Do you know any others?
Acorn Electron (needs plus 1 interface)
Atari Portfolio (only on Chess card)
Atari XL/XE
Commodore C16/C116/+4
Commodore C64
Commodore VIC-20
Dragon Dragon 32/Radio Shack TRS-80
Exelvision EXL-100
Hanimex/Soundic Pencil II (games?)
IBM PCjr
Mattel Aquarius
MSX (Cartridges and cards)
Sinclair ZX Spectrum (needs an interface)
Sord M5
Spectravideo SVI 318 / 328 (Own carts and with an adapter Colecovision carts)
Texas Instruments TI 99/4-4a
Thomson Mo5
Thomson To7
Amstrad CPC 464 plus (plays GX4000 cartridges)
Bit 60 (plays VCS carts, is it released?)
Bit 90 (plays Colecovision carts)
Elektor TV Games Computer (expanded version) (plays Interton/Radofin cartridges)
Sega SC-3000 (same as SG-1000)
Vtech Laser-2001 (Plays Creativision carts and with an adapter Colecovision carts)
Maybe there are some japanese ones missing, I'm checking that later.
the TI99/4A has some great games on cartridges
here is a really good website
http://www.videogamehouse.net/
and if you some carts for sale....
I like the TI99/4A. As you said it has some nice games and it also has some nice artwork. The TI Invaders box looks so cool... I don't have games for sale, I'm not really collecting for the TI. My machine is from a flea market and came with about ten carts and a friend found a second lot for me a couple of months ago.
Anyway thanks for the link! That's a really good site.