I am only using Nikon capture NX-D at the moment.
Real simple and easy to use, emulates the D700/D300 camera JPEG setting such as "vivid" etc....
I like it a lot and it is free which I like the best.....
I have posted dozens of examples on the forum in the various telephoto threads and surfing thread and a basketball thread, maybe a few other places. Not pro results for sure but I am pretty happy. Once I get more into landscapes and the like vs family pics and action shots I will probably need more processing power......maybe not.