iExplorer app helps you to manage the important cloud servers within one single app. Also iExplorer HD is a good eBook reader, media player, photo viewer, and work assistant. You can read CHM, ePub, PDF and large text/PDB files with outline/bookmark/annotation support, play musics and movies without copying them to your device, view large photos on your PC/NAS and share to friends, edit spreadsheets on your Google Docs and save them as different formats, print any viewable documents.
There are many features included in the iExplorer Access files on iPhone/iPad or Windows Sharing Files/NAS server/FTP Server/Cloud server, Transfer files/folders/subfolders between iPhone/iPad and remote servers, Stream photos from your NAS/FTP/Cloud servers, Embedded PDF viewer, support outlines, bookmarks and annotations and more.
If you want to enjoy the app, then you can get it from the iTunes store: iExplorer HD