Regpack is an online payment software that allows businesses to collect and manage client data and payments from a secure back end dashboard. Email communication, integrated payments, recurring billing, reporting, and analytics are built-in. Regpack makes it easy to manage and charge clients securely with your team and embeds on your website for a seamless process.
Eventzilla - Eventzilla lets you sell tickets online and manage attendees from one integrated application.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Joplin - Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.
Ticket Tailor - Ticket Tailor is an easy-to-use event ticketing platform that allows event organizers of all shapes and sizes to sell tickets online.
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.