Mastering Bitcoin - The Bible for Bitcoin
Pop - Super fast, lo-fi video texting with close friends
30 Seconds of Knowledge - Become a better developer, in every new tab.
Dropsource - Mobile development platform for building native iOS & Android apps
Cryptominded - Where you learn more about cryptocurrencies
WenPay.me - WenPay makes it easy to send payment requests that should be paid in cryptocurrencies.