Stripe Billing - A set of tools for billing and subscriptions
CoinList - Build a diverse portfolio of pre-launch token investments
PayHere - Run a services business or startup? Charge recurring and one-off payments with beautifully designed payment forms. Get up and running in less than 5 minutes!
Crypto Buyer's Guide - Extensive cryptocurrency buying guide
Square Installments - An easy way to offer monthly payment plans to your customers
CoinCap.io - Shows the prices of different cryptocurrencies from ShapeShift.