BackendFS is a backend driver for the open source ActiveSync
It allows you to sync your smartphone contacts and calendar with a
server running PHP. All data is stored in the filesystem (hence
the name), no need for an additional database or other software.
All your data is stored in the filesystem as XML files. Easy to backup,
easy to further process.
have control over your privacy
In case you don't want a data-hungry company receive and store all your
private contacts and appointments, you're now able to run your own server.
Z-Push is easy to set up
(assuming you've already got PHP up and running) and so is BackendFS.
BackendFS is released under the
AGPL, the same
license as Z-Push itself.