People were arguing about Rust’s std lib recently, so I went through the Cargo.toml of all the Rust projects I’ve written since 2015 and picked out the choice tools that get used over and over again. Up to date as of October 2020. Also see RustCrates, though that’s old. There’s also this, which is narrower but deeper, and awesome-rust, which is shallower and broader, and the various more specific