geeks3d.com — This article shows how to linearize the depth buffer values in GLSL. read more...
geeks3d.com — Here is a night vision post processing shader in GLSL (OpenGL shading language). The complete source code of shader is provided and a demo showing the shader in action is available. read more...
blog.mouaif.org — Something that might interest you.. all the Photoshop blending modes as GLSL macros + RGB to HSL (hue, saturation, luminance), contrast, desaturation. read more...