Gnip is the other one. It was recently acquired by twitter though: https://blog.twitter.com/2014/twitter-welcomes-gnip-to-the-flock https://blog.twitter.com/201

Gnip is the other one. It was recently acquired by twitter though: https://blog.twitter.com/2014/twitter-welcomes-gnip-to-the-flock https://blog.twitter.com/2014/twitter-welcomes-gnip-to-the-f...