For a project I'm involved in, I am looking for a webdav library in java.

Here are the options I've get looking in the web:

• Jackrabbit: this is recommended by this guy in stackoverflow
• Sardine: it appears to be more or less recent (last commit in dec 2011 at this moment -sept 2012-)
• Milton
• WebDav construction kit: it is part of the jakarta project, so at list is backed up by an important sponsort… even at the end this means nothing
• The webdav project: it appears to be nothing more than a good start, but let's give it a chance

And least but not last…

Please checkout http://www.webdav.org/projects/, a list of webdav projects for ideas.