clocviz is an extension of cloc that lets you "analyze a target codebase and render interactive visualizations: users can traverse the file tree with a simple mouse click and see statistics including lines by file, lines by language, percentage composition per language, etc."
A self-guided syllabus about computing history based on the show "Halt and Catch Fire," with a pitch-perfect retro design.
(Site code here: https://github.com/ablwr/halt-and-catch-fire-syllabus)
Interactive graphs showing how much time NHL players spent on the ice (and how much time they spent on the ice together!) in the 2019-2020 season.
Code here: https://github.com/jemmaissroff/hockey