Many programs installed in your PC need a username and password to work correctly. Some of them automatically store this data, and as they are hidden, you end up forgetting them.
Multi Password Recovery is a simple program able to recover passwords from more than 90 programs. In a few seconds you can see your password and insert it into the program, browser, messenger, etc.
Also, if you want the opposite, in other words delete all traces of a password, just select that option from Multi Password Recovery, and each time it locates a password it will delete it, so no-one can recover it.
Multi Password Recovery also has a simple tool to check the quality of passwords, so you know if they could resist attack or not.