The Meaning of Life, the Universe, and Everything.
Just a really small MCP mod I made a while back, because I found doing /give every time I needed a command block pretty tedious (and I clear my inventory a lot). Adds command block to redstone tab. Should be compatible with 99.999% of other MCP mods, since all it does is add a single line of code to the BlockCommandBlock class.
Keep in mind this is the first time I have ever made an MCP mod (I have made a few for Forge, though), so please go easy on me.