Free multi platform software for windows

Klorofil Platform is an open source PHP based platform built to ease and accelerate web based and desktop GUI (non web based) application development using PHP programming language. The platform was developed by Klorofil Collaboration Project (Klorofil).
Klorofil Platform is an open source project initiated by Saltanera Teknologi, an e-business solution provider company. The goal of the project is to build a new PHP enterprise-level application development and deployment environment.
Klorofil Platform made available by Saltanera under Common Public License version 1.0 (CPL). It is an open source license which has been approved by Open Source Initiative.
Main features:
- Multi Platform. Currently, Klorofil Platform supports Windows and Linux operating system. In the future, the platform will support more operating systems.
- GUI framework for desktop application development named as gambArt. gambArt let developers developing a non-web (GUI desktop) applications easily using PHP, a programming language which is widely used and widely known for web application development.
- Web application framework named as Semok. The framework helps PHP developer developing a robust, secure web based application easily.
- Distributed computing framework named as Televoke.
- Class libraries: I/O, XML, SMS, e-mail, HTTP, socket, etc. This library eases developers job. Developer can easily use classes available in Klorofil Platform. They dont have to write commonly used classes or try to find it in the internet. It will save much of their valuable time.
- Database abstraction layer which supports Oracle, MySQL, PostgreSQL, and SQLite.
- Byte compiler. This feature let developers encode their PHP source code. Developers will be able to distribute their PHP application to their clients without revealing the code to the client.
- And many more features. In the future Klorofil will provide 3D library, documentation automation system, GUI builder, and PHP Application Server.
Enhancements:
- Source code included, performance improvement due to PHP GDI extension addition, more components, more libraries.

Professional, optimizing, multi-platform C and C++ compiler with a comprehensive suite of development tools In a single package, Open Watcom C/C++ and FORTRAN offers a comprehensive development environment with the tools, SDKs, and libraries you need to create powerful 16- and 32- bit applications for popular PC platforms.
Combining an integrated development environment (IDE) and a comprehensive set of tools with state-of-the-art compiler technology, Open Watcom C/C++ and FORTRAN delivers productivity and performance.
Watcom C/C++ is a professional, optimizing, multi-platform C and C++ compiler with a comprehensive suite of development tools for developing and debugging both 16-bit and 32-bit applications for DOS, extended DOS, Novell NLMs, 16-bit OS/2 1.x, 32-bit OS/2, Windows 3.x, Windows 95, Win32s, and Windows NT (Win32).
The Open Watcom C/C++ and FORTRAN compilers support powerful remote debugging capabilities right out of the box.
Support is included for remote debugging over the serial port, parallel port, TCP/IP for all supported platforms (including DOS!). There are also remote debugging layers for Novell Netware networks (IPX and NetBIOS) as well as remote debugging within virtual DOS machines and more.
The best feature of the Open Watcom remote debugging support is the ability to cross compile and debug any target platform from any host platform!
You can if you want develop and debug Win32 applications from OS/2 or DOS, and when the Linux port is complete you will be able to build and debug Win32 applications from Linux!