keyframe_derive is used at run time in 2 crates (of which 1 optionally). It's used only as a dev dependency in 2 crates.

Depender (with downloads and own rev deps) keyframe_derive version
gdnative_tweener ^1.0
360 blue_engine_utilities optional ^1.0.0
7.8K 40 ggez dev ^1
130 good-web-game dev ^1.0.0