I created this world and re-organized it over the years to better meet my needs as I continuously update my simple texture pack (Redstone Utility).
If you want to jump in and test out your own texture pack or someone else's, this world has all the blocks in the game laid out in sections (Also see my massive list of items/blocks in the game)

Todo: Spawn NoAI mobs in, etc..
Note: Some blocks don't maintain thier 'freeze' state after world reload