The DeDuplicator is an add-on module (plug-in) for the web crawler Heritrix. It offers a means to reduce the amount of duplicate data collected in a series of snapshot crawls.
JDuplicate is a free client/server multiplayer word game suite. It is multilingual and supports popular word games such as Duplicate and Scrabble(TM). The server and default client are written in Java; clients for KDE, OSX and Win32 are being tested.