The most popular one’s are L8twr’s, Secior’s and Hal9000’s.
Personally I like Hal’s the best. It’s simply astonishing and (gasp) almost makes the prequels interesting plot wise. PLus he did some color correction work and added film grain, as well as cuts aimed to make it more like the OT and fit into that timeline more.
I like them so much I’m currently editing them to my own preferences, to make my complete edit.