Related link: http://sourceforge.net/projects/sstorm
SandStorm is a modular, component based framework for building middle-end Web products. Distributed components sport their own user-defined API, kept in mind by the SandStorm registry. Based on XML-RPC, the system is language- and platform-independent; alpha-level Python, Perl, and PHP implementations are already available for download. SandStorm, of course, borrows its name from Microsoft’s HailStorm Web Services infrastructure.