FullSync
FullSync is a universal file synchronization and backup tool which is highly customizable and expandable. It is especially for developers, but the basic functionality is easy enough for everyone.
fullsync update web tool
FullSync Features:

Publication and update of websites, synchronization of local directories and making backups of your data.

Pidgin – Open Source IM

Pidgin is an easy to use and free chat client used by millions. Connect to AIM, MSN, Yahoo, and more chat networks all at once. Support Windows and Linux/Unix OS
Pigin Support more than one IM 

AIM, Bonjour, Gadu-Gadu
Google Talk, Groupwise, ICQ
IRC, MSN, MySpaceIM
QQ, SILC, SIMPLE
Sametime, XMPP, Yahoo! …

Areca Backup – Personal Backup Tools

Areca Backup is a file backup tool written in java. It supports data compression & encryption, incremental backup, file history explorer and many other features. Areca Backup also includes a transaction mechanism which guarantees your backups´ integrity. As an additional security mesure areca also features …

FreeFileSync

FreeFileSync is an Open-Source folder comparison and synchronization tool. It is used for fast and easy configurable sync operations between two folders without restricted or overloaded UI interfaces.
FreeFileSync Features:

Compare files (bytewise or by date) and synchronize them.
No limitations: An arbitrary number of files can be synchronized.
Subfolders are also synchronized, including …

FreeOTFE

Using this software, you can create one or more “virtual disks” on your PC/PDA – anything written to these disks is transparently, and securely, encrypted before being stored on your computer´s hard drive.
FreeOTFE Features:

 Source code freely available
Easy to use; full wizard included for creating new volumes
Data encrypted on your PC …

Just a free small utility for backup your computer driver and also restoration utility to the new computer but very useful for I.T. team.
DriverBackup

Fast and user-friendly free tool for drivers’s backup, restoration and removal with command line options, automatic restoration from CD\DVD and path formatting. DriverBackup! includes also an interactive …

Nullsoft Install System

NSIS (Nullsoft Scriptable Install System) is a professional open source system to create Windows installers. It is designed to be as small and flexible as possible and is therefore very suitable for internet distribution.
Being a user’s first experience with your product, a stable and reliable installer is an …

Eudora – Free Email program

 Eudora is the best email program for people who get lots of email. If you’re not one of those people now, you will be soon. So, take control of your email before it takes control of you. Eudora is more than a way to send and …