While doing some PHP coding for ZombieCC.Net, I found that I needed to reliably generate a SHA-512 hash of some text. Later on I needed to include a salt with the text.
Normally, I'd just code up a page with the salt and text I need in the code, then view it from the browser and copy the resulting hash, but this time I needed something I could link to the users and get their respective hashes in order to update their user accounts (I was updating the user login and password hashing code). Thus, this hasher page was born.