it is a statistic plugin, it shows you your frags per death (means: how many kills you make for one dead) with min/max. It's more easy to say just your (how we call it) "fraggl" as a comparison for your skill. it shows up after you get killed or killed someone.
to show your fraggl type
say fraggl
say /fraggl
and to reset your min/max type:
say fragglreset
that's it!
have fun
PS: the fraggl_de.sma is a german version.
PSS: on forums i always called guro, in games etc. im c0ldk!lL3r so don't be confused by my name ;-)