JRun is a J2EE application server, originally developed in 1997 as a Java Servlet engine by Live Software and subsequently purchased by Allaire, who brought out the first J2EE compliant version. It was acquired by Macromedia prior to its 2001 takeover of Allaire, and subsequently by Adobe Systems when it bought Macromedia in 2005. Its latest patch Updater 7 was released by Adobe in 2007.