/r/Skookum: Skookum - This sub is intended to be a place where people come to learn, or teach. (Or have a chuckle out in the shop) - August 2, 2018 - 14:13
/r/Damnthatsinteresting: Damn, that's interesting! - The most interesting place on reddit - August 1, 2018 - 21:46
/r/mechanical_gifs: 100% Non-Organic .gifs - This sub is for .gif/.gifv/silent .mp4 images that contain a subject matter of mechanical origin. - August 1, 2018 - 21:04
/r/NoSillySuffix: No Silly Suffix - Posts from the network of subreddits which uses that ridiculous suffix. - August 2, 2018 - 13:59
/r/oddlysatisfying: Oddly Satisfying - For those little things that are inexplicably satisfying. - August 2, 2018 - 13:29
/r/EngineeringPorn: Engineering Porn - August 2, 2018 - 04:03