HassleMe is an online nagging service. Users can sign up to get nagged for various tasks which they fear they would other wise procrastinate. Hassleme sends you email reminders and keeps sending them until you stop it from doing so.
I particularly loved the simplicity of the idea, even though there are countless alert services which would email+text you to do things, but hassle me uses the terms such as hassle and nagging to create a feeling among susbcribers that someone is actually forcing them to be good.