Sahi Pro v5.1.1 is a bugfix release and contains some significant bug fixes. A complete list of features incorporated into the release and bug fixes made, etc., can be found here: What’s new in Sahi Pro v5.1.1
Sahi Pro is a mature, business-ready tool for automation of web application testing. Sahi is available as an Open Source free product and as Sahi Pro, the commercial version.
Sahi Pro is arguably the best choice among all web automation tools for testing teams in product companies and captive IT units which need rapid reliable web automation.