+* [astroid](https://github.com/astroidmail/astroid), a graphical threads-with-tags mail user agent for notmuch. Written in C++ using GTK+, WebKit and gmime.
+* [bower](https://github.com/wangp/bower), a curses frontend written in [Mercury](http://www.cs.mu.oz.au/research/mercury/).
+* [jaro-mail](http://www.dyne.org/software/jaro-mail) a terminal application to access, store and operate e-mail using notmuch and [alot](https://github.com/pazz/alot) for search and backup operations. Features GNOME keyring support, server-side Sieve filter generation, Anonymous remailer (via mixmaster3), GnuPG encryption and tools to manipulate maildirs and address lists (to/from VCard). Written in Zsh and C. Integrates [mutt](http://www.mutt.org/), [fetchmail](http://www.fetchmail.info/), [msmtp](http://msmtp.sourceforge.net/), [abook](http://abook.sourceforge.net/).
+* [mutt-kz](https://github.com/karelzak/mutt-kz), a fork of [mutt](http://www.mutt.org/) with Notmuch as a backend (actually linked against lib notmuch).
+* [notmuch-web](https://bitbucket.org/wuzzeb/notmuch-web) A web front end written in [Haskell](http://hackage.haskell.org/package/notmuch-web).
+* [notmuchfs](https://github.com/tsto/notmuchfs), a virtual maildir file system for Notmuch queries.
+
+## Historical
+
+* ner, a curses frontend written in C++ ([github mirror](https://github.com/pioto/ner)).
+
+## Tools based on Notmuch
+
+* [patches](https://github.com/stefanha/patches), a patch tracking system.
+* [notmuch-extract-patch](https://github.com/aaptel/notmuch-extract-patch), a tool to extract patches from a thread.