Punchbowl - A party planning and greeting card website
Online-RSVP.com - Beautiful online RSVP for wedding & other events. Create an online invitation, track your guests responses.
Invite Share - TechCrunch - Reporting on the business of technology, startups, venture capital funding, and Silicon Valley
RSVPify - A powerful and awesomely customizable platform for selling tickets online for your event.
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.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets