I don't want to step on the toes of the other Fallout 3 mod related thread, but it was focused mainly on wishlists, whilst I wanted a thread to discuss actually released and in progress Fallout 3 mods.
So far, less than a week after the game is out, I'm using the following mods for Fallout 3.
Not bad. I've got a couple things for gameplay, one to increase fight balancing, the other to remove an annoyance. Two things for graphics. Then there is the much needed UI upgrade.
Small steps? Yes, but you have to walk before you can run.