Owncloud is an open source project, which enables Dropbox like functionality to your own web server.

http://owncloud.org/

I've tested it on Apache running on Ubuntu 12.04 and MySQL running on unRAID.

Is has the following dependencies: php5 (>= 5.3), php5-json php-xml php-mbstring php5-zip php5-gd

And as optional dependencies: php5-sqlite (>= 3), curl, libcurl3, libcurl3-dev, php5-curl, php-pdo

 

Is it possible to get it running on Simplefeatures web server?

 

 

Already tried, works fine. Symlinks to shares freezes the GUI, could be an owncloud problem. Otherwise all else works.

would it be possible to install it on a unRaid 4.7? If yes, is there a short how-to?

Hmmm, I'd suggest maybe Bubbas Web package for now (search forum). My package is pretty reliant on the 5.0 plugin system.