This might be the wrong place to post, but since I can’t find anywhere better…
DAVdroid is on F-Droid, as noted on the project website (http://davdroid.bitfire.at/what-is-davdroid). There are two things.
- The spelling of F-Droid is “F-Droid”.
- Should you want a link, and I think it is reasonable, this one is good. https://f-droid.org/repository/browse/?fdid=at.bitfire.davdroid