This is Samplr, an intelligent and embeddable sampling profiler for Java applications. For a complete description and usage, please see https://web.archive.org/web/20120818095220/http://weblogs.java.net:80/blog/jjviana/archive/2012/08/06/samplr-embedding-power-visual-vm-your-application
Binary downloads can be found in the downloads section: https://github.com/jjviana/samplr/downloads