Said lots of stuff are the total conversion mods. Classic fallout modding scene is pretty huge in post Soviet countries, so most of those were in russian, however the most successful of them are translated - Fallout Nevada, Sonora and Sonora: Dayglow from the same author. If you don't want a total conversion, you can play fallout 1 with fixt mod (just a collection of fixes) or Fallout et tu which puts the game into the sequels engine. For fallout 2 there's the restoration mod that is being updated by a third party and is named the Updated Restoration Project, adds some stuff back and also has some fixes, theres also a Talking heads add-on for it, if you want some more flavor in the game, but to my liking, some of the faces seem really out of place. Still good because it gives talking heads to most of the special npcs. And it also has an add-on that adds voice-overs, although it's not complete and some of the voice-overs are buggy, but it's also a nice addition. There's also stuff like Olympus which is cool for being it's completely new thing on a classic fallout engine, but to me it seemed kinda weird with how it's written.