DeltaWalker (AKA: Deltopia DeltaWalker) is an advanced and professional file and folder visualization comparison and synchronization software for Windows, Mac and Linux platforms. It has a lot of features and is powerful, but it pales in comparison to similar tools like Beyond Compare. Especially since it's written in Java and using the Eclipse IDE, the entire program is too bloated, which is something AppNee can't stand.

WinDataReflector is a powerful and easy to use file/folder backup & synchronization software developed by Veridium from Germany. It comes with features like simple and clear UI, small file size, fast file comparison and transfer algorithms, visual comparison of files and folders, and two-way synchronization with fully customizable rules.