Invitastic

Invitastic hails itself as a tiny website for inviting friends and family (and even enemies and strangers) to events.

Invitastic hails itself as a 'tiny website for inviting friends and family (and even enemies and strangers) to events.' While the 'About' page lists the capabilities that Invitastic does _not_ have, ('There are lots of things you can't do here...create a social network, plan party activities, split the tab for the event, figure out carpool arrangements, find recipes for Mai Tais, and more. There are pretty much a limitless number of things that Invitastic doesn't do') the site provides a simple way to send out a mass invitation to users, and also to record their RSVPs, for free.