Allway Sync

Allway Sync compares files in specified folders and copies the modified file to the counterpart folder, i.e., it synchronizes folders. Unlike other file sync tools that just copy files with the most recent modification time, Allway Sync uses a true bi-directional synchronization algorithm that does not depend on system clock accuracy, and also propagates file deletions correctly. Allway Sync is brainlessly simple and free for personal use.