Ottomate is now an open source project (BSD license) on Google Code!
With Mac OS X 10.4, Apple introduced a new application for graphically configuring automated Workflows called Automator. Automator allows Mac users to drag and drop discreet, self-contained pieces of functionality from different OS X applications called Actions into a repeatable, savable Workflow. Building an Automator Workflow is roughly akin to graphically crafting an automated script -- without writing a single line of programming code!
That's where the OttoMate Web Test Actions come in... This suite of six Automator Actions contains everything you need to graphically configure automated, repeatable user-acceptance tests for web-based applications.