Problem
Membership clubs needed RSVP and ticketing that understood members, guests, and the door.
WordPress Plugin
Sitebix Event RSVP
Event RSVP and ticketing, sold through Freemius.
Freemius
PHP
WordPress
Solution
A WordPress plugin for RSVP, party tickets, and door check-in, licensed through Freemius.
Results
Event RSVP is a Freemius product. It is not listed on WordPress.org.