Simple and effective backup manager. Pigeon backup was made out of a basic need - to provide a simple, friendly and useful backup utility to backup all of my applications. Following the Keep it simple motto, i've resisted adding any fancy interface on top of the application, focusing instead only on the basic functionality.
The app is completely free for commercial as well as personal use, and the app is provided as is - without any warranty. Not sure if it's of any comfort, but I do use it everyday to backup my entire media collection (over 2 terabytes of data).

Pigeon backup contains three basic features - mirror, copy and zip.
1. Mirror : Basically creates a mirror of your source directory on the target directory, delete all non-matching files on the target
2. Copy : Similar to the mirror mode, except that it will *not* delete any non-matching files on the target.
3. Zip : The zip mode will create a zip file out of the source directory.

Requirements:
* Java

The license of this software is Freeware, you can free download and free use this data backup software.