DAVdroid: What is DAVdroid?
May 3, 2014 at 9:51:22 PM GMT+2 - permalink -

- - http://davdroid.bitfire.at/what-is-davdroid

Baikal for Synology | Free Development software downloads at SourceForge.net
May 3, 2014 at 9:49:56 PM GMT+2 - permalink -

- - http://sourceforge.net/projects/baikalforsynology/

CalDAV + CardDAV lightweight server: Baïkal
May 2, 2014 at 12:29:54 PM GMT+2 - permalink -

- - http://baikal-server.com/

vdirsyncer synchronizes your calendars and addressbooks between two storages. The supported storages are CalDAV, CardDAV, arbitrary HTTP resources and vdir.
May 2, 2014 at 10:27:10 AM GMT+2 - permalink -

- - https://github.com/untitaker/vdirsyncer