Freeraser is incredibly easy to use. Freeraser places a Recycle Bin-like icon on your desktop that you can use like a shredder. Just drag a file or group of files to the bin and they'll be forever erased from your computer

KeePass Classic  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).

gpg4usb  is a very easy to use portable-application, which combines a simple text-editor with a GnuPG-frontend to write, encrypt and decrypt your text-messages. gpg4usb should work on almost any computer you're working on, should it be a Linux-machine or even one with a Microsoft-OS running.

CleanAfterMe allows you to easily clean files and Registry entries that are automatically created by the Windows operating system during your regular computer work. With CleanAfterMe, you can clean the cookies/history/cache/passwords of Internet Explorer, the 'Recent' folder, the Registry entries that record the last opened files, the temporary folder of Windows, the event logs, the Recycle Bin, and more.

CCleaner is a freeware system optimization, privacy and cleaning tool. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history.