The open source ownCloud project is advancing today with version 4 of the popular file sharing and synchronization technology. What ownCloud provides is an open source take on a Dropbox model where users can share and save files in a cloud environment. With ownCloud, the technology is all open source and it can be hosted anywhere.
The ownCloud 4 release debuts a number of new features to further differentiate the technology from its competitors. At the top of the new features list is the ability to do file versioning. A user can now have multiple versions of a file saved in ownCloud, which can enable rollback if necessary.