Punchbowl - A party planning and greeting card website
BeingSo - Send free animated greeting cards, birthday invitations.
Stuff - A platform for invitations to private and public events.
RSVPify - A powerful and awesomely customizable platform for selling tickets online for your event.
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.
Whoozin.com - Free RSVP Online | Track RSVP’s and Sell Tickets for your events and recurring meetings.