Validated ideas - List of 5,000 poorly executed but popular apps
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
The 25 Days of Ideas - Free resources for coming up with startup ideas
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
IdeasAI - OpenAI-powered startup idea generator
Ticket Tribe - Sell tickets online with no fees per ticket