CheckROM is one of my favourite custom ROMs for Samsung Galaxy S II. So the very first custom that I tried on Samsung Galaxy S III is CheckROM EvoHD ROM. What makes CheckROM special? It has Kitchen Pro Application which is very useful to customize CheckROM EvoHD ROM even further. You can install custom boot animation, modem, kernel, widget / apps, font and mods with Kitchen Pro. Cook all the ingredients by yourself. Make CheckROM EvoHD ROM a perfect Android ROM that matches your needs.
I am using CheckROM EvoHD V2 while writing this guide. And there is V3 ROM already. Anyway, most of the features are the same just V3 ROM is based on newer official Samsung Galaxy S3 firmware. Here are some of the features that can be found on CheckROM EvoHD ROM – smoother scrolling, build.prop tweaks, hardware acceleration enabled (GPU UI enabled), multi CSC, deodexed, zipaligned, busyBox installed, auto brightness mod (10 Steps), most of the Samsung widgets and apps are removed, added 15 Toggles and other more. By the way, do get the latest build and more information at XDA website.
Installation guide ~ How to install firmware on Samsung Galaxy S3 with ClockworkMod Recovery? (Video)
Download CheckROM EvoHD ROM here.