Kauna is a music visualizing software. There is a bunch of different visualizations that reacts to system sound or microphone. So, application can work with any media player, application or sound from website (e.g. youtube).
Cannot change visualization easily on demand.
A hotkey to cycle selected visualization would be awesomeAaditya Deshmukh has used this product for one week.
I love music visualisers.Cons:
Cannot time travel