Providing a website featuring non-downloadable software for event organizers to use to build branded mobile app landing pages to promote their events with customized content, to create, sell, scan and validate event tickets, registrations and receipts, to process electronic payments, to manage and track attendee arrivals with a user-friendly check-in process; Providing a website featuring non-downloadable software for managing and tracking daily and current event sales while onsite, for viewi...