LinkyPass is an awesome Chrome Extension that generates secure passwords, unique to each website you visit, based on your own master password. You only have to remember one password, but you'll get a different password for every website you visit. It builds on the great work of SuperGenPass, but makes it more secure & easier to use.
When you're not able to use LinkyPass, you can still use the tools available at SuperGenPass, they will generate the same passwords.
LinkyPass is super convinient to use, just download it from the Chrome Store and give it a try!