If it was installed as a Package, your system saves details on every file it installed. There aren't yet good gui tools to acsess this information and automate uninstalling, but the foundations for such a thing are there.
If comfortable with the commandline, you can access this information yourself. Within /Library/Receipts, you'll see packages for everything you've installed. Within each one, Contents/Archive.bom is the "bill of materials" that lists information about every file. You can read these files with lsbom, eg "lsbom Archive.bom | less".
You could then rm all these files, ideally through some scripted processing of lsbom's output. (I won't offer such a script here, as anyone who can't compose it probably would be better off not using it.)