TomorrowIt is a project mainly written in JAVASCRIPT and RUBY, it's free.
Simple to-do list app with Don't Break The Chain feature
TomorrowIt is a simple to-do list application with a don't-break-the-chain calendar. The application supports anonymous users as well so that you don't have to create an account to use it.
The app is running on Rails 2.1.1 and the framework is frozen so no additional gems are needed.
The app is currently hosted on Heroku at http://tomorrowit.com/.