QuarryPlus is an add-on for Buildcraft that adds Advanced Quarries and various other items
Adds quartz ore to the overworld which is useful for when you don't have access to the Nether, and adds quartz tools and smoky and rose quartz variants.
QuazarCraft by Qwiddle
This mod adds Quazar, a technologically advanced metal/crystal with magical properties. This ore can be used to make many decorative blocks and a multiblock 3x3x3 crafting table. Plants, World Gen, Armor, and Weapons have been added or will be soon. Machinery will come eventually.