ProphIt is a CPU profile visualizer written in Java and rendered using the GL4Java OpenGL bindings. ProphIt employs a novel 'tower diagram' that displays the proportional time usage of nested functions in an intuitive way, and facilitates navigating through the profile. ProphIt does not gather CPU profiling data; instead in includes file parsers for known CPU profile formats such as Java's hprof and the old -prof. ProphIt is working software with documentation. It was originally developed to be a commercial product but it is now being open sourced.