<b_jonas> slashlearn euclid//Euclid is a short geeky game in which the goal is to do Euclidean compass and straightedge constructions in as few steps as possible. It runs in the browser, found at "http://www.euclidthegame.com/". It was popular among #esoteric regulars in 2016-07.

peng is a computer network administration software utility used to test the reachability of a destination host on an Internet Protocol (IP) network, and the destination host's ability to reach the originating host.