OpenBlocks

OpenBlocks is a mod by the OpenMods Team that adds various helpful, and fun blocks and items into the Minecraft environment. OpenBlocks adds fun and interesting liquid storage and item transport solutions. It adds it's own version of Sponge which works like vanilla Sponge used to, except with the ability to clear all liquids. It even adds a painting system, allowing recoloring of certain blocks. OpenBlocks also adds it's own form of Liquid Experience, and machines that can use it to automatically rename, enchant, and repair tools/items.

OpenBlocks is open source, under the MIT license and the code is available on Github