I apologize for missing scoop, even though I am regular user of it.

To add to the list and hopefully make it more complete

Scoop : http://takescoop.com

Lyft Shuttle[In beta] : http://lyft.com/shuttle

Uber ExpressPool : https://www.uber.com/ride/express-pool/

I think the ridesharing businesses are making a real difference in optimizing cars usage and helping the environment in the process.