UraniuCraft'm by TheeAnonymousOne
You can craft a bunch of stuff with uranium. This mod is in beta release so just expect a few bugs.
MachineMuse's Modular Powersuits by MachineMuse
A mod which adds modular power armor, power tool, and a tinker table to configure them. Uses UniversalElectricty or IC2 for energy.
Lot's 'o Recipes by Hoofer, Jonathan, MCreator
This mod adds a TON of new recipes, including a few items in the mod.
Archimedes' Ships by BalkondeurAlpha
Craft and create your own ship... And sail it across the seven seas!