1. HTTPS Everywhere: https://www.eff.org/https-everywhere/
HTTPS Everywhere is a Firefox and Chrome extension that encrypts your communications with many major websites, making your browsing more secure.
2. Bugmenot : http://www.bugmenot.com/
Bypass many webpages requiring free registration with the click of a button.
3. KeePass: http://keepass.info/
KeePass is a free open source password manager, which helps you to manage your passwords in a secure way. You can put all your passwords in one database, which is locked with one master key or a key file. So you only have to remember one single master password or select the key file to unlock the whole database. The databases are encrypted using the best and most secure encryption algorithms currently known (AES and Twofish). For more information, see the features page.
4. Eraser: http://eraser.heidi.ie/download.php
Eraser is an advanced security tool for Windows which allows you to completely remove sensitive data from your hard drive by overwriting it several times with carefully selected patterns.
Why do you need it ?
When you delete a file, the operating system does not really remove the file from the disk; it only removes the reference of the file from the file system table. The file remains on the disk until another file is created over it, and even after that, it might be possible to recover data by studying the magnetic fields on the disk platter surface.Before the file is overwritten, anyone can easily retrieve it with a disk maintenance or an undelete utility.
5. privatix: http://www.mandalka.name/privatix/download.html.en
Free portable encrypted system on an usb flash drive or an external hard drive for safe editing and carrying along of sensitive data, for encrypted communication and anonymous web surfing
6. RetroShare: http://retroshare.sourceforge.net/downloads.html
RetroShare is a Open Source cross-platform, private and secure decentralised communication platform.
It lets you to securely chat and share files with your friends and family, using a web-of-trust to authenticate peers and OpenSSL to encrypt all communication.
RetroShare provides filesharing, chat, messages, forums and channels
7. trackerwatcher: http://www.privacychoice.org/trackerwatcher/download/
Monitor privacy while you surf
See who’s tracking on any webpage and how they use your data
7stons 