File Manager

Explorer XP

It's a very fast, small( only 410 KB !) , compact and innovative file manager for Windows 2000/XP. Unlike the regular Windows Explorer, it allows you to browse multiple folders from a tabbed interface and also displays the total size of each folder. Download

Undelete files

Restoration

It's a small utility to recover / undelete accidentally deleted files. It works with FAT, NTFS as well as digital camera cards. Conversely, it can safely erase any files from your computer, which makes it impossible to retrieve later on.  Download 

Disk Cleaner

CCleaner

CCleaner is a System Optimization and privacy tool. It removes unused files, obsolete registry data etc from your system - allowing Windows to run faster and also freeing up valuable hard disk space.Download 

See also :  Easy cleaner

Personal Firewall

Comodo Firewall Pro

Offers firewall protection, Program Control, defense against Trojan Protocol and more .... Download 

See also : Zone Alarm Basic

Browser Plug-in

Roboform
Roboform is the top-rated IE / Mozilla plug in . It acts as a Password Manager and Web Form Filler that completely automates password entering and form filling. All you need is to remember one master password, rest of the passwords are remembered by Roboform. Passwords are encrypted for complete security. Download

Anti Virus

AVG Anti-Virus
It's a free anti virus protection tool for home / personal use. It has improved virus detection based on better heuristics and NTFS data streams scanning with smaller installation and update files. It has improved user interface. Download

Office Suite

Open Office.org

This is a Multi Platform, Multilingual office suite that has all the modules found in MS-Office suites like word processor, spreadsheet, data base, Presentation etc. What's more, you can open all the MS-Office application as well. Download

Spyware remover

Spybot S&D

Spybot - Search & Destroy can detect and remove spyware of different kinds from your computer Hard disk and Windows Registry. Download

 Email Client

ThunderBird

It's a full-featured email application. It supports IMAP and POP mail protocols, as well as HTML mail formatting. Easily import your existing email accounts and messages. Built-in RSS capabilities, powerful quick search, spell check as you type, global inbox, deleting attachments and advanced message filtering. It also has junk mail filters, Anti Phishing protection with automatic updates. Download  

Search your computer

Google Desktop

Best software to search documents from your computer. It can start showing result as soon as you type keywords in the search box. Amazingly fast. Download 

Disk Encryption

TrueCrypt

It is a free open- source disk encryption software for Windows Vista/XP/2000 and Linux. It can create virtual encrypted disks, can encrypt entire hard disk partition or a device, such as USB Flash drive. Download

Image Editor

GIMPShop
It's a free opensource image editor that is similar to the popular Adobe Photoshop. The menu structure and terminology are adepted to look and feel more like Adobe Photoshop. Download 

Photo Album Software

Picasa

It's a free photo organizer software available from Google that helps you locate and orgnize all the photos on your computer, Edit and add effect to your photos  with a few simple clicks; create slide show and also share your Photographs over net.  Download