Libraries and header files of libev are all in the libev-devel package.
acquired package info from repodata DB: repodata/f1f85c23079e7764ad00378a9fc5d660b89a03657290e75426caf7be5b7da462-primary.sqlite.bz2
A high-performance event loop/event model with lots of features
Libev is modeled (very loosely) after libevent and the Event Perl module, but is faster, scales better and is more correct, and also more featureful. And also smaller.