There used to be a plugin for the java console. Now you just enable it by running ControlPanel, which is a program in $JRE_HOME/bin. Set "Show Console" to true and you'll get it whenever an applet is loaded in the browser.
This is a private blog about setting up and designing a Denial of Service Testing Framework (DOSTF). It consists of a set of C-tools for launching DDoS attacks and monitoring their effects on various platforms. The DDoS attack tools are only designed for experimental purposes and won't work outside of a laboratory. They are also not generally available.