OpenSTA is described as 'distributed software testing architecture designed around CORBA, it was originally developed to be commercial software by CYRANO'. There are seven alternatives to OpenSTA for Windows, Linux and Mac. The best alternative is StresStimulus, which is free. Other great apps like OpenSTA are AgileLoad (Freemium), SilkPerformer (Paid), Load Tester (Paid) and LoadUIWeb (Freemium).
Web Performance Load Tester™ is the only web testing tool smart enough to tell you how many users your website can handle. Use another tool, and youll find yourself staring at charts for hours trying to figure it out—if you can even tell at all.
step is a comprehensive test automation stack designed to achieve high efficiency in testing pipelines. It is well suited for DevOps delivery. It ships with a distributed execution platform, a collaborative test management system and many plugins.