Rubotium
This is an Android's Instrumentation test runner. It's in quite early phase but already solves couple of issues with instrumentation tests:
- runs tests in parallel
- retries failed tests
- does execute all the package tests even if the app dies during the execution
Installation
gem install rubotium
Requirements:
Installed android SDK with aapt in your PATH 
 Installed java with javap in your PATH
Usage
$ rubotium -t <path_to_tests.apk> -a <path_to_application.apk> -r <instrumentation_test_runner>
$ rubotium -h for help
Contributing
- Fork it ( http://github.com//rubotium/fork ) 
- Create your feature branch (git checkout -b my-new-feature)
- Commit your changes (git commit -am 'Add some feature')
- Push to the branch (git push origin my-new-feature)
- Create new Pull Request