Allway Sync is a file and folder synchronization software for Windows.
It is FREE for personal use (with limitations), however, you should pay for a Pro license if you use this software for a commercial purpose or to process more than 40,000 files in a 30-day period.
It is together with GoodSync the only free high professional synchronisation tool, able to address WebDAV-Remote Memory, Windows Mobile SD-Cards, all Windows Mobile files, FTP Remote Memory or Amazon S3 online storage. No PC-to-PC sync about the web, as DropBox, Windows Live Sync, SpiderOak or SugarSync do. MTP is not supported.
Allway Sync uses innovative synchronization algorithms to synchronize your data between desktop PCs, laptops, USB drives, remote FTP/SFTP and WebDAV servers, various online data storages and more. Data compression and encryption are supported. It combines bulletproof reliability with extremely easy-to-use interface. Allway Sync also can synchronize your PC data with a Mac via Sync Gateway.