IDN Safe is a browser extension which blocks internationalized domain names to prevent you from visiting probable fake sites.
MD5 Lock - Password Securer
Secure your passwords.
Premiumize.me extension for Opera
Workspace Crypto Extension
File Guard (Encryptor | Decryptor)
Encrypt or decrypt any file with just one click inside your browser!
Provides website information such as Rank, and checks URLs against suspected pages.
Шыфраванне асабістай перапіскі ў сацыяльных сетках.
PfP: Pain-free Passwords
Use a single master password to generate secure passwords for all websites - without losing track of passwords you cannot change.
Secure password aggregator.