Santa Barbara-based cloud deployment software developer RightScale said Thursday that it has added three new customers, bringing its total number of software-as-a-service providers to more than 100. The firm said that Progress, Pearson Education, and Resumator are using its products to deploy and manage their software-as-a-service applications for customers in cloud environments. Impact of hte various deals was not disclosed. RightScale's software is used by software-as-a-service companies to manage updates and deployment of their software into the cloud. RightScale's products work in public, private, and hybrid cloud environments.