I have many FFT and spectrum display programs (at least 12 on this machine).
I was, once again, looking to generate some noise profile images for a report and in frustration, went back to the web looking for alternatives - I found Span Plus.
Several of the features make generating the presentation materials I need super easy and effective - taking the files into an editor/mixer so that I can use the plugin is completely offset be the ease of seeing what I need and capturing PNG files all within the software - I know it probably wasn't your intent to support the test and measurement industry, but it does!
Impressed enough that I just bought the Premium Membership and am looking forward to using the tools for their real intent - Music
I discovered Voxengo products through a great friend who recommended them when we were working on Call of Duty cinematics. They were quick to use, got results quick, and I still use them for real-time design in SoundMiner/VST. Through time, there’s one Voxengo magic bullet that I use on Car sound design to add harmonics and distortion that’s always loud and proud as the first plugin in the chain.