simpl is used at run time in 80 crates (of which 1 optionally). It is a direct run-time dependency in 3 crates. It's used only as a dev dependency in 18 crates.

Depender (with downloads and own rev deps) simpl version
221K 12 smpl_jwt ^0.1
221K 12 goauth ^0.1
rust-hashcash ^0.1