The Tcl Web Application Framework helps simplify writing Web applications in the Tool Command Language (Tcl). It provides the features that form the basis for writing an application, such as sessions, users, privilege separation, and an abstract database interface. It is currently under development, but stable for production use.
Rivet CGI allows Rivet applications to run as a CGI, either automatically (i.e., no modifications to the applications themselves from "mod_rivet") from Apache, as a standalone CGI under any Web server, or as a standalone HTTP server itself. It can be used to build Web applications that can be distributed and executed as a single file in either CGI or Standalone HTTP mode.
Templum is an extremely lightweight, simple yet powerful, and fast templating engine for PHP. It re-uses the power of PHP itself for rendering templates, but provides additional features making it easier and more secure to write templating code. Rendering templates using Templum is very fast; it approximates native PHP rendering speed for include() statements.
Jaiwls is a component oriented framework with bundled a servlet Web server (Jetty) and HTML widget library. It is easy to integrate in existing applications with static compiled Java classes and supports dynamic websites using Groovy, a runtime injectable singelton instance, well formatted stack traces, a low memory footprint for compiled projects, powerful URL rewrites possible, a production mode (with no recompilation) for Groovy-based applications, and much more.