Specyscope is a Spectrogram / Oscilloscope combo for Ableton Live, displaying up to 3 stereo audio sources at the same time.
This plugin will be free on the 14th of March (or free immediately for supporters http://www.patreon.com/tomcosm )
I created this because I find seeing the two visual representations of audio side by side to be a huge help when designing sound and mixing tracks.
Both the Oscilloscope and Spectrogram have various parameters you can tweak - a rundown video can be found here : https://youtu.be/gQIjBbuxdAw