NYRR
ImpactQA tested NYRR.ORG which has a .NET Front-End and a Drupal back-end. A team of functional, automation, performance and security testers helped NYRR test multiple web applications. The quality of testing performed was great (given that NYRR is a complex website) and we never had any issues in production. I highly recommend ImpactQA and wish them success.