Agile Toolkit is a high-performance PHP framework for UI development with jQuery. High levels of efficiency are achieved because your database and your UI are seamlessly and securely integrated. Achieve more with less code.
Albatross is a toolkit for developing highly stateful web applications.
Apache XML Delivery Toolkit: a suite of tools for the Apache httpd server running mod_perl, that give developers extremely flexible options for delivering XML to all kinds of browsers, from handheld systems, Braille readers, and ordinary browsers
Bootstrap is a toolkit from Twitter designed to kickstart development of webapps and sites.
It includes base CSS and HTML for typography, forms, buttons, tables, grids, navigation, and more.
CGI::Wiki is a Perl toolkit for writing Wiki software.
FormMagick is a toolkit for easily building multi-page CGI forms. It uses an XML form description to generate the forms, and supports internationalisation.
kapcha is a toolkit to build IT operations management portals. kapcha will be able to gather management information from variety of network & systems management tools as well as other data sources.
MynahSA is a cross-platform toolkit for connecting C++ objects to data streams. Developers using MynahSA can quickly and easily create client/server applications or encrypted files containing serialized object data. The toolkit uses OpenSSL for encryption and secure network communications. MynahSA is tested on Linux, Microsoft Windows, Apple's Mac OS X, and Sun's Solaris.
PHP-Qt is an extension for PHP5 that aims to write software with the Qt Toolkit. It provides an object-oriented interface to the Qt4 Framework and allows to write Qt applications in the PHP language.
PHPLIB is an object-oriented application development toolkit for PHP. It is primarily of benefit to Web application developers, but contains classes which are useful to other PHP develoepers as well.
Roadsend PHP SiteManager
Roadsend PHP SiteManager is an open source web application toolkit for PHP. It includes a compiler that produces native binaries (no interpreter required).
Sajax is an open source tool to make programming websites using the Ajax framework ? also known as XMLHTTPRequest or remote scripting ? as easy as possible.
Telecom Web Services Toolkit
IBM's Telecom Web Services Toolkit Preview enables any ISV or Web developer without specialized telecom knowledge to build telecom-enabled applications. This toolkit is an extension to WebSphere Studio Application Developer; it supports the integration of e-business applications with the telecom network.
The Translate Toolkit is a set of tools designed to assist translators and localisers, with a specific focus on the Gettext PO and XLIFF formats. These tools currently include converters for Mozilla to PO and OpenOffice to PO, and checkers for punctuation, accelerators, etc.
trillbox is a flexible and extendable toolkit for building dynamic web pages. Written in Perl and based on Template::Recall, it provides "widgets" (or controls) that you can quickly integrate into your Perl web application.
WebPython is a web-application development toolkit, written in Python. It contains a portable object-relational database layer, a Python-object persistence system and a templating engine, among other stuff.
XML Windowing Toolkit. It lets you write remote applications -- applications that run on a server, yet can "project" their user interface onto any computer, anywhere on the Internet.