XKat is a simple-to-use, affordable backup program. XKat is a file synchronization tool. And XKat is an FTP client. Using XKat, you can compress, copy, backup, and synchronize your files in a click or on a schedule. XKat's +Internet edition expands the range, adding the ability to copy and synchronize files with an Internet computer. Free to try, XKat Basic sells for $25.50 while XKat +Internet sells for $35.50.

Twin Folders is a file and folder synchronization utility.
If you are working on two different computers - for example a desktop and notebook, then you need to keep your work files up-to-date at both of them. Perhaps you do not want to even remember what computer you used last and next time you want to work on either of them. Twin Folders will help. Run synchronization before or after you use any of your computers and eliminate any concerns.

SynchPst - the easy way to synchronize data among two personal folders. Just choose either single or multiple folders/subfolders to synchronize.
Synchronize all Outlook items including notes and distribution lists. Deletions are supported, too.
If the selected folder does not exist in the target file, the entire folder is copied otherwise the source and target files are compared and the entries are synchronized based on a highend algorithm.

This is simple but very usefull synchronization utility.

This program can synchronize only files which were modified in the past few days. So, you can have two large folders on two computers, and you are using Flash Drive for copying files, for example. When you make some change in one of these folders you can call Sync Last Files for synchronization. It will copy only modified files to the Flash Drive.

PowerFolder is a free tool to synchronize files over the internet or local network. It can be used to exchange every type of data, for example - documents, photos, music, videos or project files. PowerFolder can automatically detect and synchronize the changes. It runs on Windows, Mac and Linux. PowerFolder uses peer-to-peer technology to exchange the files.

HideFlash is a security software to protect files and folders on USB flash drive from viewing them without your permission. Your files and folders are hidden and remain invisible on any computer to which you connect your USB flash drive. It is useful for anyone who wants to protect their private data.

EZOutlookSync is a straightforward yet versatile solution to synchronize MS Outlook files and folders between two or more computers. No matter how many different folders you use to keep your Outlook data or even how many computers these folders are spread over, EZOutlookSync dramatically decreases the time needed to always keep your files updated.

Disk Size Manager - a powerful hard disk space manager for Windows. Using DSM you can keep track of your hard disks space to ensure its most
efficient use. With its 2D/3D pie and bar charts as well as detailed descriptions in words,
DSM provides you with the complete information about folders and drives you
indicate. The information includes folder/drive space (total available, compressed, used by
different types of files, etc.)

ALLnSync is a fast friendly Directory / File synchronizer. It's main function is to sync critical files in a directory and it's sub-directories on drives which can be on the same PC, or different PCs over a network.It can keep files synced between a networked desktop and laptop. It can sync to / from any drive that is directly writeable from your PC. Silent Scan watches for changed files as you work and Sync Two Drives does it all now

AJC Directory Synchronizer makes it easy to synchronize files and compare folders between any two locations. Synchronize large numbers of files between computers, sync laptop to desktop, mirror to backup drive, sync mp3 player etc.

Wizards make it very easy to setup your synchronize task which can be saved as a project for quick regular use. Built in archiving system makes it easy to recover files if you make a mistake.