I use PURE IMAGE NR. Its an unlimited trial but it puts a very small logo (Pureimage) in the bottom right hand side of the picture which is easily removed by cloning out.
There's not many adjustments but you can set the overall "strength" and select the removal of Block Noise. It also displays Exif information of the picture. You can also choose the area of the magnified display of the picture and there is a split screen of before /after of the selected area.
It does work very well. I hope this helps.
