Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Wikivoyage - the free worldwide travel guide that anyone can edit.
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
TravelPeri - Find top tourist attractions to explore, with travel times!
Ticket Tribe - Sell tickets online with no fees per ticket
Vacation Stress Relief - Vacation Stress Relief is an online solution that enables you to plan the perfect trip with great ease.