Available for Windows, Mac OS X, and various Linux distributions, the ownCloud Desktop Sync client enables you to:
Your files are always automatically synchronized between your ownCloud server and local PC.
Because of various technical issues, desktop sync clients older than 2.2.1 will not allowed to connect and sync with the ownCloud 8.1+ server. It is highly recommended to keep your client updated.
The 2.5 release of the ownCloud desktop sync client has many new features and improvements. (See the complete changelog.)