IRILL - Research and Innovation on Free Software Originally inspired by the sup mail user agent (MUA), Notmuch is a GPL3+ set of tools for for dealing with your mail (stored in Maildirs or similar) via searching and tagging. On top of the C bindings and a scriptable command line interface, the project directly supports user interfaces based on Emacs and VIM as well as integration with Mutt. We also support Python, Ruby, and Go bindings. Other projects based on Notmuch include curses based frontends written in Python and Mercury, a fork of Mutt using Notmuch as a the backend, a web interface, and a virtual Maildir filesystem. In this short talk I'll give a tour of the Notmuch set of utilities, concentrating on the Emacs interface and command line tool.