LZW is used at run time in 340 crates (of which 36 optionally). It is a direct run-time dependency in 6 crates. It's used only as a dev dependency in 58 crates (of which 1 directly).

Depender (with downloads and own rev deps) LZW version
ascii-gif ^0.10.0
1 rust-rcs-core ^0.10
1 binjs_io ^0.10
gifriend ^0.10.0
rustiff ^0.10
1 yaged ^0.10.0
1 salzweg dev ^0.10