Akelos Framework
Port of Ruby on Rails development framework and designed to work for PHP4 and PHP5. The purpose of the framework is to support developers in building and managing multilingual database-backed web applications using the Model-View-Control pattern [Open Source, GLPL].
http://www.akelos.org

Zoop Framework
A Object Oriented Framework for PHP, Zoop Framework caters to the programmer and includes ajax and validation. Zoop also features a PHP implementation of .NET controls called GUIControls [Zope Public License, GPL compatible].
http://zoopframework.com

Visual Component Framework
The VCF Website - Online information about the visual component framework, a cross-platform C++ framework.
http://vcf.sourceforge.net

The Visual Component Framework
C++ framework created to provide platform GUI framework, features such as Java and Java's Swing, and Borland's Visual Component Library.
http://vcf-online.org/

Goal Seeker -- Solving the 15 Puzzle
The world's largest development and download repository of Open Source code and applications
http://sourceforge.net/projects/goalseeker/

The Horde Application Framework
The Horde Application Framework is a general-purpose web application framework in PHP, providing classes for dealing with preferences, compression, browser detection, connection tracking, and MIME handling. Demo implementations frameworks are viewable [Open Source, LGPL].
http://www.horde.org/horde/

Compact Framework QuickStart Tutorial
Provides guidance in a variety of areas of CF programming and also techniques and workarounds for situations when code for the full .NET Framework cannot be used in a device application. These QuickStarts also demonstrate classes specific to .NET Compact Framework for SQL Server CE, controlling the Soft Input Panel (SIP) on the Pocket PC, and for sending and receiving custom Windows messages.
http://samples.gotdotnet.com/quickstart/CompactFramework/

The ICAgent Framework
A generic framework and architecture for the development of intelligent collaborative BDI agents.
http://www.icsd.aegean.gr/Postgraduates/emav/

Microsoft .Net Framework SDK QuickStart Tutorials
Information about the most compelling features of the .Net Framework technology.
http://samples.gotdotnet.com/quickstart/

Cynergy Systems Enterprise Application Framework (EAF)
A framework for n-tier PB applications with some other tools.
http://www.cynergysystems.com/public/products/eaf/