WrappingGum - Create a sales page for your gumroad products
Animo.js - Animo.js is a lightweight, open-source tool that enables developers to manipulate animations and transitions.
Gumroad Checklist - Create a converting Gumroad product page
Magic Animations CSS3 - CSS3 Animations with special effects.
Mokkup - Create Stunning Dashboard Mocks in Minutes!
Ceaser - Ceaser is a handy CSS Easing Animation tool for creating any ease imaginable.