Extreme Password Generator Pro - It's fast, flexible, and free, which is a nice combination for a password generator. There's not much in the way of design to Extreme Password Generator, but
PWGen (Password Generator) - Download Password Generator for free. Pwgen is a small, GPL'ed password generator which creates passwords which can be easily memorized by a human.
Infinite Password Generator - Infinite Password Generator is a deterministic password-generator.
Password.es - Free online password generator.
Passbolt - Open source password manager for teams
SecureBlitz Strong Password Generator - SecureBlitz Strong Password Generator is a completely free online password generator that allows you to generate strong passwords.