Froged - One click solution providing easy-to-use marketing, sales and support services to turn website visitors into happy customers.
Bulma - Bulma is an open source CSS framework based on Flexbox and built with Sass. It's 100% responsive, fully modular, and available for free.
Keep Your Friends Close - A free e-book about maximizing Customer Lifetime Value
Milligram - A minimalist CSS framework
ChatWoot - Open-source omnichannel customer engagement platform
Material UI - A CSS Framework and a Set of React Components that Implement Google's Material Design