solana-keccak-hasher is used at run time in 110 crates (of which 5 optionally). It is a direct run-time dependency in 6 crates. It's used only as a dev dependency in 27 crates (of which 1 directly).

Depender (with downloads and own rev deps) solana-keccak-hasher version
309K 597 solana-program ^2.2.1
88K 1 solana-example-mocks ^2.2.1
39K 22 solana-bpf-loader-program =2.2.1
350 3 mollusk-svm-fuzz-fs ^2.2
330 2 mollusk-svm-fuzz-fixture-firedancer ^2.2
280 2 mollusk-svm-fuzz-fixture ^2.2
76K 6 solana-secp256k1-program dev ^2.2.1