May is used at run time in 12 crates (of which 3 optionally). It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) May version
3.5K may_minihttp ^0.3.46
340 may_actor ^0.3
250 2 rioc ^0.3
wolfengine ^0.3.21
1 may_waiter ^0.3
karics ^0.3.49
1 co_managed ^0.3
may_rpc ^0.3
server_nano ^0.3.45
140 sib optional ^0.3.51
flowgger optional ~0.3