This plugin provides three light-weight CommandBlock utilities that will undoubtedly prevent frustration.
Coordinate inputInstead of having to manually count the blocks that a block is away from the commandblock, simply enter /cmdcoords, click on the command-block and the desired block, and the plugin will insert the neccessary coordinates directly into your command-block.
Short-term backup / copyWhen you accidentially delete a command-block by clicking it in creative mode (it happens to the best of us!), the plugin remembers the command until it is unloaded. That means you can restore it by looking at the command block its supposed to go into and entering /cmdrestore. Can in theory also be used to copy commands from one command-block into another.
Prevent less-careful staff from destroying command blocksIf there are some among your team that lack appreciation for the effort that goes into getting a command perfectly correct, and tend to axe away command-blocks like blades of grass, you can prevent them from destroying the command blocks. Just set the permission "cbt.destroycommandblocks" to false for them.
cbt.use: Use /cmdcoords, defaults to op
cbt.restore: Use /cmdrestore, defaults to op
cbt.destroycommandblocks: Allowed to destroy command blocks, defaults to true. (True does not mean that other normal checks are overwritten)