HTML5 Canvas makes it possible for users to draw images directly in the web browser. We want to use this functionality to let users quickly draw simple image diagrams / illustrations to better explain their technical questions or answers. Here is the minimal feature set that we are looking for, starting with estimated importance, or estimated frequency of use: (70%) - most often used - free-form brush drawing with various brush thickness and c

I've seen this clever marketing tactic on many websites - when I am about to leave their website and move my mouse up fast to the top of the screen (to close their tab in Chrome, etc), the site reacts real fast, showing me some large modal window with "subscribe" email capturing form, or with "special offer" . The timing is really good, and I usually stop for a second to decide on that modal window. I do it almost unconsciously, and so I woul