Coinbase - Bitcoin, safe and easy.
RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.
Binance - Cryptocurrencies exchange platform
Slickdeals.net - Slickdeals: The Best Deals, Coupons & Discounts on everything
Poloniex - US-based cryptocurrency exchange with maximum security
Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.