DrasticScope Signal Analysis Software is a suite of software products for signal analysis. There is a free version, great for training and signal validation purposes, including low budget and no budget video workflows. There are also paid versions available for more fully featured workflows, including SDI/HDMI analysis, HDR/WCG workflows, and ST-2110/IP stream analysis.
We have recently added a number of professional scopes to the suite that you would expect to see only on far more expensive hardware based signal analysis devices, such as the Channel Plot, YCbCr Vector, Composite/Luma Peak, and 6 Bar Gamut scopes.