Logic-less templates.

Available in Ruby, JavaScript, Python, Erlang, node.js, PHP, Perl, Objective-C, Java, .NET, Android, C++, Go, Lua, ooc, ActionScript, ColdFusion, Scala, Clojure, Fantom, CoffeeScript, D, Haskell, XQuery, ASP, Io, Dart, and for Haxe

Works great with TextMate, Vim, Emacs, and Coda

The Manual: mustache(5) and mustache(1)

Demo