Well I have a medium-suzed collection of Colleco carts, and found the Wiki page with all known listings. I haven't compared it yet with the carts I have, but they're likely all on the extensive list. I also have a number of Adam tapes, but that is another problem. It shouldn't be a great problem to transfer them to another tape, altho rubber melt-down, as I learned unfortunately from some of my 8-track tapes could be a problem.
My 2600 carts are also all , as you suggest, likely already transferred from that popular medium. The Vic-20 and my few C-64 carts could also possibly be transferred using my multi-cart accessory to a 1541 fdd as Carlsson suggests. Similarly my Atari 8 bit ones, altho I don't have a multidisk adaptor but do have 2 or more slots. Most of those carts are system related and surely the emulator people have figured out how to transfer such as Atari Basic to disk. On the CoCo, and in regard to the all-important fdd cart, Cloud Nine has done some incredible hacks, even to adding a hdd. I only have about 2 TI disks, so , with all apologies to Ksarul, it's not a problem for me. That leaves only the PCjr, for which I have only 2 Lotus 123, and a couple of game carts, which Mike Brutman has well in hand.
Lawrence