Developer website: Tracyvalleau.com
CloneEject is a simple Applescript drag and drop application that creates an invisible file named ".metadata_never_index" at the root level of any unlocked drive dropped on it. The purpose of the file is to prevent Spotlight from indexing the drive the next time it is mounted. This helps cloning software such as SuperDuper copy files faster.
The intended use of CloneEject is that after using your cloning software, you�ll drag and drop the disk icon on CloneEject. The first iteration of the software also ejected the drive (hence the name) but that seemed to confuse too many people, so now, the zip file you get includes a script to write the file, and a script to delete the file along with very clear instructions. (You must eject the drive yourself, now.)
Requirements
Mac OS X 10.4 or later