Canon Digital Photo Professional for RAW processing and this is usually enough. It dovetails well with GraphicConverter (Mac and universal binary only) which is excellent for import, sorting and other minor post processing like correcting horizontal, unskew and sometimes the unsharp works better that the DPP built-in sharpen, likewise better control of compression. The freebie Sapphire posted recently looks similar to GC for you PC guys.

When I had a Panasonic FZ7, I became a temporary PSE4 afficionado, but now find that even for older FZ7 and E4500 messed-up .jpg/tif shots, the DPP 'RGB adjustment' pane does rescues better using just one integrated levels and curves window and I do not miss the alert telling me I am in the wrong layer, it has no pixels in it etc etc one bit. I do miss the 'brush' as signature, but not going to run it just for that.

DPP (and I imagine Nikon Capture) keeps the original RAW or JPG untouched and only/additionally saves the 'recipe' for what you have done to it, so only a few kb addition to the one RAW file ever needed stored and backed-up