If you want a really good way to edit pictures, and you happen to have a Sony camera, then I can strongly recommend Capture One Express from Phase One. You can download it for free and it works very well with the raw format from Sony cameras.
I took the picture above on the way into c4di with my venerable old RX100 this morning and used Capture One to straighten it, light up the foreground a bit and sharpen some of the edges. I’m really very happy with the result.
One other neat trick, is that if you’ve got a camera like the RX100. It is very interesting to search a place like Thingiverse for your camera type. I’ve just done that and turned up a whole bunch of bounce flash adaptors, filter rings and cases that look like they might be worth printing out and using.