Leco is reimplementation of Eco, partly because of NIH, partly because I wanted to play with writing template compiler, partly because I was not satisfied with how original implementation was structured and in here I was responsible for everything.
It works largely as Eco, but supports custom tag types, so you can add your own
tags, i.e. <%_ ... %> for i18n and whatnot.
Proper description will follow. I guess.