Hi all, I have just released a new Boost.Asio-based library, Urdl, which can be used for accessing and downloading web content. <http://think-async.com/Urdl> <http://sourceforge.net/projects/urdl> It currently has limited support for the protocols "http", "https" and "file". It provides an easy-to-use extension to standard C++ iostreams and an asynchronous interface for use with Boost.Asio. In addition to (hopefully) being useful, it is intended as an example of using the Boost.Asio and Boost.System libraries. If you're writing protocol implementations using Asio, you might also be interested in how it uses coroutines to simplify the expression of asynchronous control flow. (Note: here coroutines refers to a macro-based system similar to <http://www.chiark.greenend.org.uk/~sgtatham/coroutines.html>, not Giovanni Deretta's GSoC project). Cheers, Chris