I already mentioned this in the last post. But thought of having a separate post for this as I love this application.

This is a free file synchronization software available from the below link:
http://allwaysync.com/

Here is a statement from their website:

Allway Sync is free file and folder synchronization software for Windows.
Allway Sync uses innovative synchronization algorithms to synchronize your data between desktop PCs, laptops, USB drives and more. Allway Sync combines bulletproof reliability with an extremely easy-to-use interface.

There are multiple versions available. If you are using this on a USB or using portable apps version, make sure you download the appropriate version from their website.

You can create multiple jobs to synchronize multiple directories. This is the easiest way to keep your computers at two different locations in sync.