Stripe - Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes. Use Stripe’s payment platform to accept and process payments online for easy-to-use commerce solutions.
Google Authenticator - Google Authenticator is a multifactor app for mobile devices.
Recurly - Subscription billing and recurring billing management. Recurly offers enterprise-class subscription billing for thousands of companies worldwide.
Microsoft Authenticator - One app to quickly and securely verify your identity online, for all of your accounts.
ServiceBot - The new, open source way to run a business online. Subscription billing, Self-service customer portal, service lifecycle management?
andOTP - andOTP is a two-factor authentication App for Android 4.4+