Android client for ownCloud with some extra features like Material Desing UI, search option in current folders, switching between list and grid views and more.
Application has no ads and is as such free to use.
Source code is available at https://github.com/skymania/Cirrus
This application is a fork of the original ownCloud Android application (GPL).
ownCloud is a file sharing server that puts the control and security of your own data back into your hands.
You can get ownCloud server for free at https://owncloud.org