They have them on TESNexus. I can't post a link to it, but search around and you'll find it easily.
But are they Free in TESNexus?
Yeah, although you need to register up (free). I'd suggest the unofficial patches as the first port of call. They fix a rake of bugs left in by Bestheda. Also there are a few decent aesthetical mods such as better grass tiling, improved textures, better watter effects, even a replacement high-detail textures patch (huge!) for those that want it. Another nice addon that really improves the game is a replacement audio pack. A guy composed music to replace the existing soundtrack and it fits really well, and makes a change from what gets boring, especially if you've played oblivion many times previously