The Millets 206 stove that TOKaMaK describes seems to use the pierceable cartridge. Cheap, effective, but you have to use up all the fuel in the cartridge before you can safely detach the cartridge from the stove.
Most modern gas canister stoves use some kind of screw-on cartridge that you can detach from the stove for storage or transport, which takes some of the adventure out of using them. Campingaz makes a stove that takes their clip-on cartridge. A lot of the screw-on cartridges are interchangeable, but availability does vary from country to country.
Alcohol stoves like the Trangia are a nice option. Denatured alcohol (meths?) is pretty widely available, the stoves are simple to use, and you don't have to worry about the gas canister going empty halfway through your meal.