Crate of the Week

Nominating cargo-about, because it lets you create the file you're legally obliged to ship with your executable according to most licenses' text. Also, it checks crates against your list of approved licenses. Where there's a choice of license, it only includes the license you've approved. By default it generates HTML, but with some fiddling about with the about.hbs it can produce nice plain text output too. Saved me a lot of time.