S3Anywhere is an Amazon S3 file manager for Android Handsets. It allows managing several S3 buckets. It comes with both handset and S3 file managers. It provides download and upload features. Resume support for download is available. File managers allows renaming, deleting, and copying files. You can view permissions (ACL) on each file and share link.

ES App Lock can 
 ✔help lock apps on your device 
✔protect your private settings
✔prevent other people from seeing your messages,emails,photos,videos and all files 
With the help of ES App Lock, you may never worry about your parents, your friends , your workmates , your children or anyone borrowing your phone

Open source Android file browser. (Early alpha version)
Simple file browser with cut, copy and paste actions.
Google Code Page