Websites

7.62x54r.net/ A Mosin-Nagant reference
sheldonbrown.com/ Information about old bicycles, great if you’re doing a fixie conversion
paulbourke.net/ Computer graphics, fractals, etc
pakin.org/ Stereograms, and a funny complaint generator
peter-wiegel.de/ Excellent historical fonts

Youtube Channels

youtube.com/@BadObsessionMotorsport Project Binky, the GOAT car project
youtube.com/@SuperfastMatt Car projects, good engineering
youtube.com/@KnitFactoryImpl Knitting machines
youtube.com/@Clickspring Clockmaking