Does anyone know any good, free MMOs that people actually play?

Definitely no fantasy MMOs, I got tired of those years ago…so nothing likes RuneScape or anything. I’m looking for games that are more realistic sci-fi, something like Eve, but less huge on the computer … Eve took 7 flipping time to download to my PC…

Also, I would like it if it wasn’t primarily combat-based, as my computer isn’t good for fast-paced, constant PVP.