Some folks have built other software on top of git-annex, or that is designed to interoperate with it.

• The git-annex assistant is included in git-annex, and extends its use cases into new territory.
• git-annex-watcher is a status icon for your desktop.
• gadu - git-annex disk usage is a du like utility that is git-annex aware.
• sizes is another du-like utility, with a -A switch that enables git-annex support.