Attached Link: http://gl.ict.usc.edu/HDRShop/

Here's a link for HDR Shop which is the premiere program for working with and exploring HDR images. I find it an invaluable tool as I have been working with one of their plugins [light gen] to do renders in Imagine3D which does not support HDRI as such.

 

Once in a while I look around,
I see a sound
and try to write it down
Sometimes they come out very soft
Tinkling light sound
The Sun comes up again