MVC framework for PHP. GPL

Mac's PHP MVC Framework 0.5.1 is an MVC framework for PHP with a built-in templating engine. It also comes with an integrated, AJAX-driven, flat file CMS solution. It was made with future extendability in mind. It is easy to install, easy to use, and has a very short learning curve. It also comes bundled with many PHP and JavaScript libraries. The framework generates SEF (search engine friendly) URLs right out of the box.

Synergiser is a content management system (CMS) that does not rely on a database. GPL

Synergiser 1.2 It features a simple blog system, TinyMCE editors for all relevant sections, complete with an image manager, a module architecture, a simple menu, an RSS aggregator, a settings manager for module settings and template/locale, a Content Pages panel for managing static pages, and a template system with definable regions.

PHP-Qt 0.9. GPL
PHP-Qt is an extension for PHP 5.1 that makes it possible to write software with the Qt toolkit. It provides an object-oriented interface to the Qt 4 framework.

Framework for developing RIA Web 2.0 applications. LGPL

Humax 0.2 provides a rich set of object-oriented client-side libraries which work seamlessly regardless of the server side technology used.

Ajax Java Web framework that enables rich UIs for Web applications with little programming. GPL
ZK 3.0.1 With event-driven components and an XUL-based markup language, developing is as simple as programming desktops and authoring HTML. Scripting languages include but are not limited to Java, JavaScript, Ruby, and Groovy.

OpenLink AJAX Toolkit 2.7. GPL

OAT offers a broad Javascript-based, browser-independent widget set for building rich user interfaces on all common browsers. It comes with sample applications for interactive SQL query composition and database design. These applications work against any Microsoft XML for Analysis (XML/A) servers, such as OpenLink Virtuoso and others.

phpRemoteShell. GPL

phpRemoteShell 0.8.0 is an application that allows you to execute shell commands and PHP code on a remote host over HTTP.

Sitemap Creator. GPL
Sitemap Creator 0.2a crawls/spiders your Web site, creates standard SiteMaps, pings Google, Yahoo!, MSN, Ask.com, and moreover.com with the location of your sitemaps, and then send you alerts by email when sitemaps are created or crawled by the search bot. The crawler saves sitemaps data into an easy to edit CSV file.

Informix-4GL compatible compiler and runtime environment. GPL

Aubit 4GL compiler 1.00.69 translates 4GL source into executable programs, enabling very fast creation of screen/form-based applications. With support for SQL statements forming an intrinsic part of the language, it's especially suitable for developing database-oriented applications. Database connectivity is provided for PostgreSQL, MySQL, Informix, and ODBC. It supports both ncurses (console mode) and GTK+ (GUI mode) output.