DAVx⁵ is an open-source CalDAV/CardDAV suite and sync app for Android. You can also access your online files (WebDAV) with it.

GNU General Public License v3.0

davx5-ose

jtx Board allows you to manage your Journals (like meeting minutes), Notes and Tasks in one Android app. The app is compatible with the iCal standard (RFC5545) and is integrated with DAVx5 to allow the synchronisation of entries through CalDAV.

jtxBoard

jtx Board allows you to manage your Journals (like meeting minutes), Notes and Tasks in one Android app. The app is compatible with the iCal standard (RFC5545) and is integrated with DAVx5 to allow the synchronisation of entries through DAV.