The Little Things Mod

From the mod maker behind the Blocktor Who Mod come the little things mod. This mod adds all the things that everyone wishes will be added to vanilla minecraft. From emerald tools to diamond biomes,  this mod adds everything. There are iron, gold, diamond and emerald biomes that have an awful lot of the named ore. There are fake stone that drops DIAMONDS and fake gravel that drops EMERALDS! A diamond bow that fires iron arrows. You can also get obsidian armour and name tags have recipes! Of course not forgetting the invisiblock, invisisuit and invisimob. This is an awesome mod that adds everything you could need.

DIMENSIONS: By building a nether portal with mega obsidian and using a nether-overworld or an overworld-nether instead of a flint and steel, you can go to a world in the nether format but with dirt or in the overworld format but with netherack.

That is all to say for now other than suggestions in the comments please.