* [muchsync](http://www.muchsync.org/) - replicate and synchronize
your notmuch database (mail and tags) across machines
-* [interimap](https://guilhem.org/interimap/) - Fast bidirectional
- synchronization between IMAP servers.
-
* [lieer](https://github.com/gauteh/lieer) - Fast email-fetching and two-way tag
synchronization between notmuch and GMail (Note that lieer was formerly known
as gmailieer.)