OwnCloud is an open source personal cloud server software, based on Php network disk program. No user registration, but you can add unlimited users. OwnCloud requirements for PHP: php5 (> = 5.3), php5-json, the php-xml php-the mbstring php5-zip php5-gd.
OwnCloud also provides many free app , slide shows, music player, PDF view, you can also add streaming video, bookmarks and other features.
Add video streaming application, you can use the online plug-in, upload video and supports external links.
OwnCloud synchronization backup file, first download ownCloud Sync Client, the input OwnCloud address, user name and password. The final step is to add a local folder, later in the folder, add or delete the file will be synchronized to OwnCloud.
Not yet seen OwnCloud mobile application synchronization, perhaps later in the development process.