DirSync Directory Synchronizer   
http://www.archersoft.com

DirSync is a powerful tool designed to backup, synchronize, replicate or restore files and folders smartly and quickly. It supports many powerful and flexible features, such as: run as service, remote administration, scheduling, simulation, bandwidth throttling, e-mail reporting, filtering, unicode filename, validation, transfer security attributes, transfer folder creation/modification time, keep deletion files, file revisioning, pre/post-sync process, error handling, path variables, ignore time difference for Daylight Saving Time, detailed log, etc. The synchronization is based on the policy specified by user to copy those files which are different between source and target folders. Using DirSync you may define multiple jobs and execute them at scheduled time automatically and silently. There are many situations of using DirSync. For example, you can backup local working directories to safe place in a server, deploy or distribute files from one location to many other computers, synchronize data between desktop and laptop, backup your working data to external USB hard disk or flash disk etc.

xSync File Synchronizer   
http://www.vbxsystem.de

xSync is a comprehensive solution for file and folder synchronization, supporting local file systems, network shares and FTP locations. An intuitive user interface and flexible engine provide advanced and though easy to use features. xSync's main aim is to compare two locations, track and display differences and synchronize them. But it also offers the complete functionality of a file manager, including full drag & drop support, deletion, renaming, display and ignore filters, mapped folders and a lot of other useful features. Why do we need to synchronize files? If you are working on more than one Computer (e.g. PC and Laptop), you probably experienced before how difficult it is to keep all your data up to date (synchronized). Use xSync to give you full transparency on file changes and to automate the synchronization process. Do you often backup data? This is a very time wasting procedure, especially if you are running your backups through the network. By using synchronization, the backup duration will be considerably optimized, as only changed files are being copied.

SynchronEX File Sync/FTP/DAV for Linux   
http://www.xellsoft.com

SynchronEX for Linux realizes robust multi-directional file tree synchronization and backup over local & network paths in any situation: From laptop synchronization to scheduled backup tasks to incremental FTP/DAV website upload. It supports true synchronization of (re)moved files and directories, provides collision detection and advanced wildcard filters. A GUI front-end with more than 15 wizards makes it easy to use. A simulation mode, error level control, project scripts (Python) and a shell (batch) interface meet the needs of advanced users. An integrated job scheduler, logging features and super-project options enable extensive automation. The virtual file system design of this file synchronizer integrates ZIP archives, FTP, FTPS, SFTP, WebDAV, automatic file version tracking (XVS), split-backup on changeable media and other storage options seamlessly. Amongst extra tools is a duplicate file finder.

SynchronEX File Synchronizer, Backup/FTP   
http://www.xellsoft.com

SynchronEX realizes robust multi-directional file tree synchronization and backup over local & network paths in any situation: From laptop synchronization to scheduled backup tasks to incremental FTP/DAV website upload. It supports true synchronization of (re)moved files and directories, provides collision detection and advanced wildcard filters. A GUI front-end with more than 15 wizards makes it easy to use. A simulation mode, error level control, project scripts (Python) and a shell (batch) interface meet the needs of advanced users. An integrated job scheduler, logging features and super-project options enable extensive automation. The virtual file system design of this file synchronizer integrates ZIP archives, FTP, SFTP, FTPS, WebDAV, automatic file version tracking (XVS), split-backup on changeable media and other storage options seamlessly. Amongst extra tools is a duplicate file finder.