Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
What If Bitcoin? - Check how much you could have made by investing in bitcoin.
Event Hunt - Startups and Tech Events Curated By Locals
Cryptominded - Where you learn more about cryptocurrencies
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Robinhood - Free stock trading service.