Well, I say mine... I stole elements of a couple of other ones to actually do the work, but I did weld them together all by myself.
It's a replacement for the Probe and Excavator scripts. Instead of sending Excavators to systems where I've probed, I've written it so that it sends direct to planets based on the coordinates. That means that I can bin the Probe script completely.
It's definitely helped; before I switched over, I was regularly hitting the 10,000 RPC limit. Now, it's coming in at about 6,500, so it's saving over 3,000 calls per day. I'm rather impressed by that.
I'm currently working on getting one Shipyard up to level 27; that'll mean that I can build an Excavator in 15 seconds. What I shall be doing then is decommissioning a lot of the other Shipyards, and switching to building Excavators manually there. The idea is that once I have a few, I can transport them off to other planets, which can send them out, leaving the shipyard world free to build more. It looks like now, when you send a ship out, it's transfered to the receiving planet immediately, which will help no end.
So now the limit to how many Excavators I can send in one day will be limited by how many I can support in Shipyards, rather than my production.
Wooo.