I'd like to have a script to manage the notes of several team members. They should be able to start working without creating a user, if later they decide to create it then move all his notes to his account. Otherwise keep them referenced through a cookie.
It should be written in php with mysql. Have a nice presentation and allow me to choose between saving in html or text.
Allow the team members to either keep their notes private or make them public so he can share them with whomever he wants. Also allow him to decide wether by sharing he allows editing or only viewing. Allow him to share his note on email, twitter, facebook.
This should be a responsive site and work on mobile platforms also.