Punchbowl - A party planning and greeting card website
RSVPify - A powerful and awesomely customizable platform for selling tickets online for your event.
Stuff - A platform for invitations to private and public events.
Online-RSVP.com - Beautiful online RSVP for wedding & other events. Create an online invitation, track your guests responses.
Guestboard - Lead powerfully-organized group events with Guestboard – a modular event platform that gives groups of 10-1000+ people a central space to coordinate, build excitement, and save money. No more crazy email threads. No more massive group texts.
RSVP Keeper - Online RSVP's made easy