Synchredible!

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.

GoodSync is the high-end professional easy and reliable file backup and file synchronization software.

SyncBack is a backup and file synchronization software that allows backing up and synchronizing files to the same or different drives, to different media (CD, DVD, Flash, zip), or to a remote server.There are three versions of SyncBack available: SyncBack Freeware, SyncBackSE (shareware) or SyncBackPro (shareware).

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. »

FileMenu Tools lets you customize the context (right-click) menu of Windows Explorer. The application adds built-in utilities to perform operations on files and folders and adds customized commands that let users run external applications, copy/move to a specific folder or delete specific file types. With FileMenu Tools, you also can customize the "Send to..." submenu and enable/disable context-menu commands added by other applications.Many very useful additional functions: create symbolic-Links, sync folders with file-deletion in both directions, show the folder-size of all subfolders »

SyncFolders helps you to synchronize the contents of two folders, including any subfolders. The folders may be on different disk drives, on the network, or storage devices attached to the USB port, including external hard disk drives, flash drives, and any other type of USB storage device. The program allows you to easily copy new and updated files and folders in either or both directions. SyncFolders is a very useful tool for backup and synchronization purposes.

DirSync Pro (Directory Synchronize Pro) is a small utility for file and folder synchronization without bidirectional file-deletion. DirSync Pro can be used to synchronize the content of one or many folders recursively. In difference to Allway Sync, SyncBack or Synkron in the bidirectional synchronizing mode no files can be deleted!Using DirSync Pro you can make incremental backups. Only new/modified/larger files would be copied.Use DirSync Pro to easily synchronize files from your desktop PC to your USB-stick.DirSync Pro is programmed completely in platform independent Java. »

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.

Copywhiz enhances your file copy experience in Windows. It offers more flexibility when copying and backing up files by letting you choose which type of files to copy & which to ignore.

ViceVersa does File Synchronization, File Replication, File Backup and File Comparison. It can automatically verify data using a CRC32 checksum.

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.