Punchbowl - A party planning and greeting card website
Partey.io - Invite to parties and events. Dead simple, privacy-first. Just send a link to your friends. No accounts needed!
RSVPify - A powerful and awesomely customizable platform for selling tickets online for your event.
IveTime - Bored? Meet and find friends spontaneously in one tap!
Online-RSVP.com - Beautiful online RSVP for wedding & other events. Create an online invitation, track your guests responses.
RSVP Keeper - Online RSVP's made easy