Webrick comes in the <a href="http://www.ruby-doc.org/stdlib-2.0.0/libdoc/webrick/rdoc/index.html">Std-lib</a> http://www.ruby-doc.org/stdlib-2.0.0/libdoc/webri

Webrick comes in the <a href="http://www.ruby-doc.org/stdlib-2.0.0/libdoc/webrick/rdoc/index.html">Std-lib</a> http://www.ruby-doc.org/stdlib-2.0.0/libdoc/webrick/rdoc/ind.... I explicitely mentioned that the latest release of PHP comes with the built-in -S server. But that before this, it was always either install *AMP of some variation, which is, frankly a lot harder. And even now, Whereas Rails requires a few commanline commands, a CMS like Drupal still needs quite some fiddling to get it ro run on your localhost. (Source: I have been professional Drupal trainer for years) But let me note that neither three of these servers are anything good for production. But, for small (internal) projects, `SimpleHTTPServer`, `Webrick` or even `php -S` might suffice, especially when behind a reverse proxy. Yet of all three, Webrick is especially slow, and php-s is especially memory-leaking and unstable.