BlueVM is well-known around here. Not only do they offer a load of locations, always have great offers, and enjoy a lot of popularity: they even have their own panel. Feathur, the name of the panel, is free for personal use and the source is available on GitHub. For more information about BlueVM, check their last offer.
Buffalo, New York => Test IP: s1.ny.bluevm.com, http://s1.ny.bluevm.com/100mb.test
Los Angeles, California => Test IP: s1.ca.bluevm.com, http://s1.ca.bluevm.com/100mb.test
Atlanta, Georgia => Test IP: s1.atl.bluevm.com, http://s1.zu.bluevm.com/100mb.test
Dallas, Texas => Test IP: s1.tx.bluevm.com, http://s1.tx.bluevm.com/100mb.test
Chicago, Illinois => Test IP: s1.il.bluevm.com, http://s1.il.bluevm.com/100mb.test
Piscataway, New Jersey => Test IP: s1.nj.bluevm.com, http://s1.nj.bluevm.com/100mb.test