Synkron is a little file and folder synchronization software that comes with many features and yet still user-friendly and easy to use.
Synkron lets you synchronize multiple folders at once across local or network locations, analyze folders before sync, restore overwritten or deleted files, schedule your synchronizations and much more.
Synkron is an ideal tool to use as a backup tool and you can have it backup and sync your folders at regular intervals automatically.
The best part is, Synkron is a cross-platform application and it is available for Windows, Mac OS X and Linux plus it is also distributed free under the GPL v2 license. Download Synkron from the project website here.