STF is the reference implementation. Written in Perl, it serves billions of objects on commodity servers
STF::Dispatcher::PSGI implements the STF interface. While the protocol is mainly simple HTTP, there are a few things you need to parse from the HTTP requests. They are simple enough, but annoying to have to reimplement every time you want to create a new STF server or a dummy STF server for testing. This module abstracts that part away.
It also comes with STF::Dispatcher::Test, which does the basic interface testing.
stf-on-dotcloud is an experimental setup to run STF on dotCloud platform.