IDEs for OpenCL development ?

I wonder what are the options here.
Could you share some/your experience with IDEs/plugins for OpenCL development.
Both Linux and Windows
For NVIDIA/AMD/Intel card
And some info whether this IDE facilitates debugging device code.

Intel® SDK for OpenCL* Applications

(Just a link, I have no experience with it. If you have and are willing to share your opinion on it – please, do so in a comment here) … CL_Kernels