I may have you beat on that one. I didn't want to spend money on Internet access in the early 2000's and libraries didn't permit access to SSH, so I made a sup

I may have you beat on that one. I didn't want to spend money on Internet access in the early 2000's and libraries didn't permit access to SSH, so I made a super simple webmail client to browse a maildir as well as a form to send messages to other people. It was orders of magnitude better than the webmail services most people were using (this was just before Gmail shook everything up).