bitcoin-secp256k1 is used at run time in 89 crates. It is a direct run-time dependency in 11 crates.

Depender (with downloads and own rev deps) bitcoin-secp256k1 version
260 5 bitcoinsecp256k1-keys ^0.1.16-alpha.0
260 35 bitcoin-scripting ^0.1.16-alpha.0
180 12 bitcoinrpc-util ^0.1.16-alpha.0
140 19 bitcoinwallet-interface ^0.1.16-alpha.0
140 4 bitcoin-crypter ^0.1.16-alpha.0
100 25 bitcoin-indexed-chain ^0.1.16-alpha.0
1 bitcoin-fuzz ^0.1.16-alpha.0
bitcoin-top ^0.1.16-alpha.0
bitcoinsecp256k1-bench ^0.1.16-alpha.0
bitcoinsecp256k1-parse ^0.1.16-alpha.0
bitcoinsecp256k1-recovery ^0.1.16-alpha.0