Free directx or opengl software for windows

a free DirectX uninstaller for Windows DirectX Buster is a DirectX uninstaller for Windows 9X, ME and W2K.
It uninstalls DirectX from version 5 up to version 8.1 without any problems.
This tool may also work properly on later DirectX versions (e.g. DirectX 9).

DirectX Tweaker is a tool that acts like an interface between DirectX and/or Direct 3D and the program that originally uses the Direct 3D interfaces.
This allows to change or log all actions of the Direct 3D interface.
DirectX Tweaker serves as a host for many different plug-ins, which provide different functions each.
With this kind of modular approach it is very easy to design special modules to interact with Direct 3D.

Develop DirectX plug-ins using Borland Delphi. Delphi DirectX SDK will help you develop DirectX plug-ins using Borland Delphi.
If you are fluent in C++, you should check out the Cakewalk DirectX Wizard. If you want to dig in further, the Sony Audio Plugin Development Kit (formerly known as Sonic Foundry PIDK) has lots of valuable doco and sample code.
Finally, the DirectX SDK that Microsoft ships with MSDN is the ultimate resource, where you can see the C++ source code for the DirectShow filter classes.
However, if you would prefer to use Delphi and avoid messing around with COM and the DirectShow interfaces, the DDX SDK V4 is for you.

OpenGL 2.1 brings one of the most marvelous premier environment for developing portable, interactive 2D and 3D graphics applications. Since its introduction in 1992, OpenGL has become the industry's most widely used and supported 2D and 3D graphics application programming interface (API), bringing thousands of applications to a wide variety of computer platforms. OpenGL fosters innovation and speeds application development by incorporating a broad set of rendering, texture mapping, special effects, and other powerful visualization functions. Developers can leverage the power of OpenGL across all popular desktop and workstation platforms, ensuring wide application deployment.

Requirements:

• Windows NT 4 SP 6
• Windows 2003 SP 1
• Windows XP AMD 64-bit
• Windows XP 64-bit SP 1
• Windows NT 4 SP 2
• Windows 2000 SP 1
• Windows 2003 64-bit
• Windows 2003 AMD 64-bit
• Windows XP 64-bit SP 2
• Windows NT 4 SP 3
• Windows 2000 SP 2
• Windows Server 2003 x64 R2
• Windows 2000
• Windows 2003 64-bit SP 1
• Windows Vista AMD 64-bit
• Windows XP Itanium 64-bit
• Windows NT 4 SP 4
• Windows 2000 SP 3
• Windows NT 4
• Windows XP 32-bit
• Windows XP SP 1
• Windows Server 2003 x86 R2
• Windows ME
• Windows 2003 Itanium 64-bit
• Windows NT 4 SP 5
• Windows 2000 SP 4
• Windows Vista 32-bit
• Windows XP 64-bit
• Windows NT 4 SP 1
• Windows Server 2008 x64
• Windows NT 3
• Windows Server 2008 x86
• Windows XP
• Windows Server 2008
• Windows 2003
• Windows Vista Itanium 64-bit
• Windows XP Itanium 64-bit SP 1
• Windows 2003 32-bit
• Windows XP Itanium 64-bit SP 2
• Windows XP SP 2
• Windows 95Windows 98
• Windows VistaWindows NT
• Windows 2003 Itanium 64-bit SP 1
• Windows XP Pro