Vcsbzr.vim is a project mainly written in Vim Script, it's free.
Bazaar integration for VCSCommand
This is a mirror of http://www.vim.org/scripts/script.php?script_id=2241
This is a plugin for VCSCommand (vimscript #90) that integrates the Bazaar version control system (http://bazaar-vcs.org). It allows the basic version control commands of VCSCommand to be applied to projects versioned using Bazaar.
This script is maintained at http://launchpad.net/bzr-vim