Maintaining a continuous integration server for iOS can be a considerable expense of time and hardware.
Some the features of Greenhouse CI include:
Easy setup and auto detection of project settings
AUtomated testing on virtual devices
Builds hosted in a cloud based environment
Easy downloading of built applications with Testflight and HockeyApp integration
Support for the Xcode build system, Xctool and Cocoapods
Special team features
A free account for up to 2 apps
You can read more and sign up for GreenhouseCI on the home page.
An interesting new service for quickly and easily adding CI to the development process.