Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
SkillMint - Find, meet and rate people with common skills and interests. Community-driven rating system.
Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
AnyChan - AnyChan is a simple image-based bulletin board where anyone can post comments and share images.
pretix - pretix helps you to sell tickets for your event in an easy way. It supports multi-lingual events and provides a wide range of features
4chan - 4chan is a simple image-based bulletin board where anyone can post comments and share images.