LIGO and allies have also provided a bunch of fun useful stuff:
Have We Detected Gravitational Waves Yet?
Gravitational Waves 101 - Markus Pössel's excellent visualizations.
SXS - Simulating eXtreme Spacetimes visualizations
The Chirp - courtesy of Georgia Tech GR group
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"Galileo got it wrong. The Earth does not revolve around the Sun. It revolves around you and has been doing so for decades. At least, this is the model you are using." -Srikumar Rao
"There is a single light of science, and to brighten it anywhere is to brighten it everywhere." -Isaac Asimov