The commonality among online instruments – regardless of discipline – is the use of online tools to administer the electronic measurements, collect participant responses, and aggregate the results for data analysis. Under the heading of software as a service (SaaS) or cloud computing, online survey software makes it possible for individuals and organizations to easily develop and administer online instruments. This chapter provides a background into SaaS and cloud computing, profiles three leading online survey software tools – SurveyMonkey, Qualtrics, and LimeSurvey – along with the PollEverywhere online and mobile polling tool. The chapter concludes with the corresponding cost and links to these online survey tools along with relevant terms and resources.