Zoji - As claimed by the developers of this Zoji, it caters online tools to aid you plan activities off-line.
Rsvpify Virtual Events - Rsvpify Virtual Events is an event management tool that provides you various functionalities ranging from setting up the entire event to selling the tickets online to the targeted audience.
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.
Magnet Event Pro - Magnet Event Pro provides tools that help you easily create a small or a large-scale event completely on your own terms.
PurpleTrail - Whether it is about birthday or wedding party or holidays, you just need to name the event and PurpleTrail will provide you the apt invitation solutions.
EventCreate Online RSVP - EventCreate Online RSVP is a tool for collecting RSVPs online.