RouterPassView is a freeware application that taps into a router’s configuration file, allowing you to recover important data like router login information, wireless network keys, and more in the event any of that important information goes missing.
Once you load the configuration file into the program, it displays your (supported) router’s passwords, wireless keys, and login information. It can also decrypt ISP usernames and passwords. It could be really handy if, say, you’re troubleshooting a less tech-savvy friend’s router or if you happened to lose that information yourself.
(See the Rest of the Story at RouterPassView Recovers Lost Router Passwords.)