Roadsend PHP is a free, open source implementation of the PHP language. It includes a compiler that produces native binaries (no interpreter required). Roadsend Compiler can build online web applications with Fast/CGI, offline web applications with an embedded web server (MicroServer), and console applications.
Although no longer actively developed, you can find the source code at its location on github
An open source PHP web framework, first released in 2001.
Roadsend, Inc. is a web development and consulting company.