At the moment I get a little bit desperate.
The Slide Project has been retired and the website offers a link to Jackrabbit.
There I found the File: jackrabbit-webdav-1.3.3.jar
Is it similar to the slide-webdav?
Or can anyone send me the jakarta-slide-webdavlib-2.1.jar so I can go on with the installation? (Or contact me with a private message)