UI Temple - Curated collection of the best web page designs
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Google Sites - Access Google Sites with a free Google account (for personal use) or G Suite account (for business use).
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
UI Garage - Specific mobile and web design patterns for your inspiration
Ticket Tailor - Ticket Tailor is an easy-to-use event ticketing platform that allows event organizers of all shapes and sizes to sell tickets online.