aCal CalDAV Client is a project by Andrew McMillan to create a straightforward Android CalDAV client for shared groupware calendaring.
Visit the aCal wiki for more detailed information about this project.
Getting the App
The app is currently no longer in the Android Market for roughly $2.00, depending on your currency.
Getting the Code
The code has been published to the aCal Git repository on Gitorious GitHub.
Getting Help
In the first instance have a look around the aCal wiki. There's specific information on there for configuring aCal to work with a variety of CalDAV servers we've tested it against.
If that doesn't solve it for you, the fastest way to get help is on IRC. Join the #acal channel on irc.oftc.net and we'll see what we can do to get you going. good luck!
There are two zero aCal mailing lists that you could subscribe to, and at present this is the best place for you to report bugs.
Take a look at the latest commits to aCal on Gitorious GitHub to get an idea of where the project is heading.
Updated in 2026 to reflect more current information, however... watch this space! A new release is actually probable this year - it's working for me