Block Extensions
Note: Currently usable in creative mode only.
Block Extensions is a modification that adds completely new building blocks to the game. The unique feature of these blocks is that they reuse textures already existing in vanilla Minecraft but apply them to new block types. You'll find textures from furnaces, pistons, chiseled bookshelves, and many other standard blocks now available as full building elements.

In addition to the main building blocks, the mod also includes special decorative elements - pride patches and easter eggs that will add variety to your constructions.
Particularly noteworthy are the missing texture blocks - they can be dyed by simply right-clicking with dye in hand:
