The world will hopefully soon be nodrop crate free, now that we have MaybeUninit which fully replaced it in arrayvec 0.5 (Rust 1.36+), and some crates have also dropped arrayvec 0.4 altogether, losing nodrop that way (which is also cool in my book.) We only need to wait for the version upgrades to trickle in. (Would it be possible to have the maintenance status in a column? 
)
My personal favourite microcrate is matches.