FindRepe finds (and optionally deletes) duplicated files by content, not name. It uses MD5 and SHA1 hashes to compare files. It can also compare just by file name.
SvnHg is a command-line tool to convert from a Subversion repository to a Mercurial one, preserving the whole history of the repository.
A Lisp-like, general-purpose scripting language.
A MOD playing library.