Ask HN: What are some platforms for remote mobile apps' testing?

Testing platforms I know are:

* Nokia Remote Device Access : http://www.forum.nokia.com/Devices/Remote_device_access/ // Free of charge

* Device anywhere : http://www.deviceanywhere.com/ // maybe the leader in the market?

* Perfecto Mobile : http://www.perfectomobile.com

Note: Those platforms use real devices for testing, not emulators or simulations