YouSerials says: Want software registration codes? Come to me.

YouSerials, an online service that is very similar to the local version software Serials2000 I used earlier, is said to be a software registration code database that has already collected more than 54,000 registration codes. Of course, compared to the local version of Serials2000, YouSerials has certain advantages, such as not needing to download any software and providing RSS output, etc.