LibreMesh - An Open Source Sofware for Geek-free Mesh Community Networks.
Baïkal - Cal and CardDAV server
cjdns - Cjdns is a networking protocol and reference implementation, founded on the ideology that networks...
Radicale - The Radicale Project is a complete CalDAV (calendar) and CardDAV (contact) server solution.
Qaul - Ad-hoc wireless mesh-network suite that harnesses the power of everyday devices such as computers...
DAViCal - DAViCal is a server for calendar sharing.