@Nilambar:

An excellent example of a single-user application would be something like a local installation of PHPMyAdmin. Though PHPMyAdmin isn't really my cup-of-tea, I can certainly understand some people being attracted to the idea of running it locally via the PHP 5.4 built-in webserver. While I think there are better ways to access a MySQL instance, I wouldn't fault someone that was comfortable with the tool.

--Wil Moore III