Dungeon Crawler [16x]

This texture pack is an old classic from the Alpha days, taking classic-esque textures and giving them a darker mood, making the world seem more dangerous.  This texture pack also provides retextures for both versions of the old Aether mod, and will provide retextures for the new Aether mod when it comes out (sometime after the official modding API).
For more detailed information, visit it's original PMC page:
http://www.planetminecraft.com/texture_pack/dungeon-crawler-224/