Scary Camera Effects - Creepy and artistic photo manipulation, 20+ filters
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Dreamscope - Make and share 'deep dream' images using dozens of supplied styles or your own.
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
Duotone - Convert any photo to a duotone in seconds
Ticket Tribe - Sell tickets online with no fees per ticket