I have been working on a functions pack! As in, install the pack and enable/disable my custom functions! Everything from survival friendly stuff to weapons of mass destruction! Fun!

Some examples include:
Anvil repairing with iron ingots
Clowning single tall flowers with bonemeal
Infinitely usable furnaces
Spawner movers

Exploding arrows!

A download link, as well as more detailed info about each, can be found at the forum post.
It is constantly evolving, and updates fairly often with changes/fixes/new stuff!