(Ustr, micro string API)
(and-httpd - simple, fast and secure)
(String library comparison)
I guess we're just exposed to different demographics then, because I've never seen anyone use it for anything else, myself included.
So I ran yum provides "*/matplotlib" to find out which package I need to install. But in general, any app that fails to find a file for any particular reason tends to push me in the direction of yum provides, whether it's a missing shared object or a config or similar file that something looks for at run time.