Free
DeleteOnClick 2.4.2.0
A very simple to use program that securely deletes (wipes) files so they cannot be undeleted or recovered. Implemented as a Windows Explorer extension so you just need to right-click on the files then choose 'Securely Delete' to wipe the files.
Free
HashOnClick 2.9.0.0
A very simple and fast program that calculates the MD5, SHA-1, or CRC32 hash values files. These hash values can be used to check if two or more files are identical. Integrates with Windows Explorer so you just need to right-click on the files.
Free
EncryptOnClick 2.0.6.0
A very simple to use program that encrypts and decrypts your files using WinZip compatible 256-bit AES encryption. The files are both encrypted and compressed, which is useful if you are emailing your encrypted files. Fully compatible with WinZip 9.