Podia - Podia is your all-in-one digital storefront. The easiest way to sell online courses, memberships and downloads, no technical skills required. Try it free!
TestFlight - iOS beta testing on the fly.
Patreon - Patreon enables fans to give ongoing support to their favorite creators.
Boombox.io - iOS devs rejoice! Embeddable HTML and hosted TestFlight beta sign-up forms.
Curious Fictions - Patreon for professional authors ✍️
Applivery - Mobile Apps distribution system for Continuous deployment, Beta testing, Feedback, Bug reporting & Enterprise App distribution.