bazaar-ng is a distributed/decentralized version control system.

Features include:
 * simple to use
 * runs on Unix and Windows
 * branches can be hosted on an http server with no special software
 * full directory versioning including tracking subdirectories,
   file renames, symlinks and execute-bits
 * friendly interface that should be familiar to users of cvs,
   svn or other systems
 * Python interface for extending and embedding, including a
   plugin interface
 * strong integrity protection, including gpg-signing
 * vibrant and active community

For usage instructions run "bzr help".