ark-secp256k1 is used at run time in 24 crates (of which 1 optionally). It is a direct run-time dependency in 9 crates. It's used only as a dev dependency in 3 crates.

Depender (with downloads and own rev deps) ark-secp256k1 version
25K 6 cairo-lang-runner ^0.4.0
7.2K 3 blockifier ^0.4.0
750 cairo-native ^0.4.0
120 4 ark-secq256k1 ^0.4.0
4 noah-algebra ^0.4.0-alpha
4 ark-bulletproofs ^0.4.0
3 noah-crypto ^0.4.0-alpha
1 merkle-tree-wasm ^0.4.0
stealth_address_kit optional ^0.4.0
2 kvac dev ^0.4.0
1 anonklub-poseidon dev ^0.4.0
1 bulletproofs_plus_plus dev ^0.4.0