How awesome is Ruby! And how amazing is the Sinatra web application language built on top of Ruby? It took me two days, starting from hardly ever having coding any Ruby, but I have a working micro-web app framework with user login and some unit tests built on Sinatra and Active Record.
I've opened a project in GitHub called Frank and now aim to round this out to be a well documented canonical example.
Frank is intended to be a very simple but feature complete web-app built on top of Sinatra that provides simple user login, password reminder, and user email verification with support for simple roles. It is intended to be used by other developers as both a well documented example of Sinatra in use, and a starting point for others wishing to implement simple web apps very quickly.
If this sort of thing interests you, and you'd like to contribute to the project at all, please get in touch via GitHub.