Following up the password utility, I’ve also created a website called Spicyham. It is used to generate unique email aliases for every site you register for. This should increase security since both the password and account name is unique for each site. You will also now when companies sell your data or have a data breach. Then you can just remove the alias.
It’s kind of like adding a +suffix to a GMail address. But the aliases can be deleted when not used anymore, and it ensures that suffixes aren’t stripped. There are also features to use a template to generate the alias, by default it uses the domain name without the TLD, but you can also add randomized strings. Just add a bookmarklet to your browser and click on it to go to Spicyham with the domain of the site already populated in the alias creation form.
You need to supply your own domain and API access to one of the supported email services. You will own the data yourself, and the aliases are not stored in Spicyham.