FusionDebug 2.0 is a professional debugger for use with ColdFusion MX 6 and 7. FusionDebug now installs a completely pre-configured IDE environment, including Eclipse 3.2 and CFEclipse 1.3, to help you get up and running as quickly as possible. It enables developers to control program execution by setting breakpoints, stepping into tags and CFC's, examining and modifying variables dynamically, and more.
Beyond that, though, there's also always an offer of a non-commercial edition for $124(see the site for clarification, but basically it's education, non-profit, or personal use when not for commercial gain) .