How do I connect a Mac to an analog TV?

Question

Is it possible to connect my MBP with a Thunderbolt port to an old CRT TV? I think the TV has composite inputs at least, and maybe S-Video too.

I'd also like to use other computers with the same TV, including one with a Mini DisplayPort and one with a DVI output (I think).

I do video-editing and it's helpful to see my work on a TV.