fmyhr

There's also Glom + PostgreSQL:
https://www.glom.org/wiki/index.php?title=Main_Page

and the somewhat quirky (and orphaned?) Druid:
http://druid.sourceforge.net/

There is also tinc ("there is no cabal"):
https://tinc-vpn.org/
It features built-in mesh routing, which can be very handy.