WaveTower is described as '® (formerly Vantage) is a patented platform from RF Venue that allows you to remotely monitor and manage RF spectrum activity over the web and on your Mac desktop. Monitor and manage local RF conditions from across town or across the globe'. There are three alternatives to WaveTower for Windows, Linux and Mac. The best alternative is DeepView. It's not free, so if you're looking for a free alternative, you could try HackRF.
Clear Waves is the next generation of PC-based, RF spectrum analyzer for the wireless pro audio and video industries that offers automatic charting of open white space, frequency coordination and channel assignment.