Yes! You can download Chanalyzer here and use this trial key to register:
If you decide you like it, you can pick up a copy of Chanalyzer standalone here for $499.
Keep in mind that for real environment spectrum analytics, Chanalyzer requires a Wi-Spy. If you don’t already own one, you can grab the Chanalyzer Essential bundle here for $999 which includes the required Wi-Spy hardware.