Don't know if this qualifies as cool but I built a single purpose site to list IMDb ratings of all episodes of a TV show in a grid, which runs on GitHub Pages. It doesn't use any external APIs. https://theshowgrid.com I built it mainly for personal use. I know IMDb ratings aren't perfect but it's a decent measure of mass opinion.
wow, this site is great. Thank you. Bookmarked! (simpsons season 2-9 really was the best, but until season 15 it was still "ok i guess")
Thanks mate! Interestingly,The Simpsons was the show that sort of inspired me to build this site. I saw an image on reddit showing all the Simpsons episode ratings and thought it would be a fun idea to build a website based on the concept.