From ACal Wiki
aCal is an Android CalDAV Client. It allows you to access your CalDAV-accessible calendar from your Android device. aCal is open source.
aCal is a Calendar application which you can use if you have an account on a CalDAV server, such as DAViCal CalDAV & CardDAV Server, allowing you to share your calendar across several CalDAV clients, on other phones, or with partners, friends or co-workers.
Calendar clients you could use to access CalDAV calendars on other computers are Apple iCal, Mozilla Lightning, EmClient, Evolution, Mulberry & Chandler. The iPhone & iPad also natively support CalDAV calendar servers.
- Configuration - including settings/experiences with specific CalDAV servers.
- Compatibility - some of the phones / tablets / servers people have used aCal with.
- Known Issues
- Mailing Lists and IRC