Group Greeting - Create group cards for the office that multiple people can sign. Office birthday cards. Create a group card in 60 seconds, add photos, and invite others to sign
Punchbowl - A party planning and greeting card website
Kudoboard - Online group card for birthdays, holidays, and special occasions!
RSVPify - A powerful and awesomely customizable platform for selling tickets online for your event.
CardClan.io - Connecting Teams Around the World with Personalized Group Cards
Whoozin.com - Free RSVP Online | Track RSVP’s and Sell Tickets for your events and recurring meetings.