Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Artboard Studio - Online graphic design app mainly focused on product mockups.
Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Canva - Canva is a graphic-design platform with a drag-and-drop interface to create print or visual content while providing templates, images, and fonts. Canva makes graphic design more straightforward and accessible regardless of skill level.
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
ProtoSketch - Powerful yet simple vector graphics editor and prototyping