Stripe Billing - A set of tools for billing and subscriptions

Monkkee - Keep a private journal securely on the Internet – to provide a convenient user experience your...

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!

The Guide - The Guide is a two-pane outliner - a program that allows you to arrange text notes in a tree-like...

Square Installments - An easy way to offer monthly payment plans to your customers

Scrapbox - A new style of note-taking that lets you create, discuss, and learn together in one self-organizing space.