JFileSync!

FreeFileSync is a free Open Source software to synchronize files and synchronize folders available for Windows, Linux and Mac OS X. It is designed to be easy to use while having nice visual feedback along the way.

SyncToy is a free PowerToy designed by Microsoft, that provides an easy to use graphical user interface that can automatically synchronize local or network files and folders, but not WebDAV-, "Windows Mobile" files or folders and no triangle-sync as only Allway Sync, Synkron, SyncLess or GoodSync can do. No VSS-support, not portable. SyncToy can manage multiple sets of folders at the same time; it can combine files from two folders in one case, and mimic renames and deletes in another case. Unlike other applications, SyncToy actually keeps track of renames to files and will make sure those changes get carried over to the synchronized folder. »

Allway Sync is a file and folder synchronization software for Windows.

A graphical interface for the Rsync engine that will synchronise files between two computers either locally or over the internet. The beauty of Rsync is that it only transfers the exact part of a file that has changed (differential synchronisation), saving bandwidth and time.

Pogoplug is cloud storage which provides unlimited storage. Access all your files, photos, music and movies wherever you are. Automatically import your phone's camera roll to your cloud so you can share the photos and videos on your phone seconds after you capture them—friends and family can watch your videos instantly!

Bacula is a set of Open Source, enterprise ready, computer programs that permit you (or the system administrator) to manage backup, recovery, and verification of computer data across a network of computers of different kinds. Bacula is relatively easy to use and efficient, while offering many advanced storage management features that make it easy to find and recover lost or damaged files. In technical terms, it is an Open Source, enterprise ready, network based backup program.

Directory Compare is a utility to help you keeping copies of your important directories (documents, programs under development and so on) in a backup hard disk or any other storage system (like USB drives or CD-RW disks). The copy can be made (semi)automatically or in an interactive way.

Backup, access and share all digital information anytime from anywhere. Secure storage, automatic backup, access, file sharing, online server, virtual workgroup, web album, backup of your mobile phone.

PowerFolder allows you to sync,share and backup folders or files in lan or online, across multiple computer and encrypted.

csync is a lightweight utility to synchronize files between two directories on a system or between multiple systems.

We built Yintersync.NET to replicate large amounts of live data from multiple systems such as documents, databases, virtual machines and multimedia over low bandwidth connections. This is achieved by using delta encoding similar to Rsync, compression and shadow copies.

Compare Advance makes comparing any two folders an easy job. The stylish interface highlights what's different between the two folders and a powerful synchronization dialog makes reconciling those differences easy too.

Require assistance synchronizing folders between 2 computers? Tired and fustrated of keeping track what files and folders are updated between both computers all the time? CleanSync is the tool for you! CleanSync allows you to synchronize large folders between 2 computers using a removable device with a small storage space using Clean Synchronization by analysing and only moving the required files and folders, minimizing data transfer and saving both space and time.