MessageHop - Messagehop.com Simple, fast, free digital postcards. No login required, just create and send
Punchbowl - A party planning and greeting card website
Whoozin.com - Free RSVP Online | Track RSVP’s and Sell Tickets for your events and recurring meetings.
Evite - Send online invitations for all occasions by email or text message. Create invites for birthdays, baby showers, save the dates, or customize your own design.
JustRSVP.me - Online Invitations and response tracking for weddings, baby showers, birthdays, parties, and other...
BeingSo - Send free animated greeting cards, birthday invitations.