solana-keypair is used at run time in 104 crates (of which 30 optionally). It is a direct run-time dependency in 43 crates. It's used only as a dev dependency in 12 crates (of which 9 directly).

Depender (with downloads and own rev deps) solana-keypair version
140K 270 solana-client =2.2.1
139K 13 solana-connection-cache =2.2.1
139K 11 solana-quic-client =2.2.1
139K 30 solana-streamer =2.2.1
139K 3 solana-thin-client =2.2.1
139K 3 solana-udp-client =2.2.1
128K 40 solana-vote-program =2.2.1
104K 47 solana-clap-utils ^2.2.1
307K 637 solana-sdk optional ^2.2.1
100K 40 solana-transaction ^2.2.1
94K 5 solana-client-traits ^2.2.1
94K 6 solana-quic-definitions ^2.2.1
93K 4 solana-genesis-config ^2.2.1
90K 12 solana-system-transaction ^2.2.1
142K 26 solana-perf optional =2.2.1
35K 11 solana-faucet =2.2.1
28K 5 solana-tls-utils ^2.2.1
16K 10 solana-clap-v3-utils =2.2.1
2.7K 4 litesvm ^2.2
1.8K 3 solana-cli =2.2.1
1.4K 1 solana-tps-client =2.2.1
1.1K solana-keygen =2.2.1
900 agave-install =2.2.1
900 agave-cargo-registry =2.2.1
850 solana-tpu-client-next =2.2.1
270 litesvm-token ^2.2
230 1 txtx-addon-network-svm-types ^2.2.1
120 litesvm-loader ^2.2
solana-keyconv ^2.2.1
519K 80 spl-token-2022 dev ^2.2.1
207K 8 solana-zk-token-sdk dev ^2.2.1
166K 15 solana-config-program dev =2.2.1
143K 54 solana-rpc-client dev =2.2.1
139K 3 solana-rpc-client-nonce-utils dev =2.2.1
124K 13 solana-zk-sdk dev ^2.2.1
109K 7 solana-vote dev =2.2.1
97K 7 solana-ed25519-program dev ^2.2.1
96K 7 solana-secp256k1-program dev ^2.2.1
91K 3 solana-offchain-message dev ^2.2.1
91K 5 solana-presigner dev ^2.2.1
87K 1 solana-transaction-metrics-tracker dev =2.2.1
30K 5 solana-cost-model dev =2.2.1
22K 10 solana-svm dev =2.2.1
21K 3 agave-transaction-view dev ^2.2.1
21K 12 solana-runtime-transaction dev =2.2.1
15K 27 solana-cli-output dev =2.2.1
13K 6 solana-compute-budget-instruction dev =2.2.1
11K 19 solana-entry dev =2.2.1
11K 9 solana-storage-bigtable dev =2.2.1
9.2K 8 solana-poh dev =2.2.1
6.7K 4 solana-unified-scheduler-pool dev =2.2.1
6.7K 1 solana-wen-restart dev =2.2.1