F4Jumble is used at run time in 57 crates (of which 2 optionally). It is a direct run-time dependency in 2 crates. It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) F4Jumble version
15K 11 zcash_address ^0.1.1
1.9K 15 penumbra-sdk-keys ^0.1.0