The Boost Utility Library isn't really a single library at all. It is just a collection for components too small to be called libraries in their own right.
But that doesn't mean there isn't useful stuff here. Take a look:
generator iterator adaptors
© Copyright Beman Dawes, 2001
Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at www.boost.org/LICENSE_1_0.txt)
Revised 07 November, 2006