Uber - Uber is a website and mobile app that allows you to get a ride similar to a taxi service from your phone.
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
BlaBlaCar - BlaBlaCar is a ride sharing service that connects travelers throughout Europe.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Lyft - Lyft is a mobile app that lets you get rides from pace to place for a fee. If you want to be a Lyft driver, you can go to their website and easily sign up to start driving for them. Read more about Lyft.
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.