Hi Comunity Gamedev

1- My question is the best IDE and Compiler to programming shader languages. I want and IDE and Compiler Multi-Plattaform
and what Shader language recommend me(Cg or GLSL) because i want a shader language Multi-Plattaform(Windows,Linux,Mac,PS3,etc) because for my game engine 3D multi-plattaform, in my engine i try to be can use in all System Operative(Windows,Linux,Mac) more later i want add support to PS3,Wii,Xbox,PSP,etc

2- And another Thing i starting to programming in Unity how shader programming to learn everything about shaders to later apply to my engine. soo what shader language is best to use in Unity, I try to be my shaders run in all versions of unity(Windows,Mac and Linux).

Thanks to all to visit my Topic and more thanks to respond and help my with my questions.

Hi
I've used OpenGL's Shader Designed before (http://www.opengl.org/sdk/tools/ShaderDesigner/) ... and it's usefull to tryout some stuff.. but i'm not sure how helpfull it will be for more complicated work

thanks for the reply,