ownCloud is an open source project for data and file sync, share and view. ownCloud server can be hosted on their own or alos in ownCloud business server.
This is the ownCloud client for Android device.
Other info in this blog post https://owncloud.com/blog/the-android-app-is-here
You could have mentioned that it’s at version 1.3 in the Google Play Store. I trekked over to Gitorious and the source is still at v1.0 there so you’ll have to pay €0.79 if you want version 1.3 as we go by what’s in the source code