RSVPify - A powerful and awesomely customizable platform for selling tickets online for your event.

Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform

Guestboard - Lead powerfully-organized group events with Guestboard – a modular event platform that gives groups of 10-1000+ people a central space to coordinate, build excitement, and save money. No more crazy email threads. No more massive group texts.

Eventbrite - Discover Great Events or Create Your Own & Sell Tickets

JustRSVP.me - Online Invitations and response tracking for weddings, baby showers, birthdays, parties, and other...

Odoo - An all-integrated business app suite to unleash your growth potential.