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.
Coinbase - Bitcoin, safe and easy.
Phonebot - Make phone calls from within a Slack channel
Binance - Cryptocurrencies exchange platform
Milligram - A minimalist CSS framework
Poloniex - US-based cryptocurrency exchange with maximum security