l use a free program called 'photoscape', its easy for us non tech savvy users, it has a few nice basic things and l like it for batch resizing of shots, it also saves the original shots so if you stuff it up, you can find the original and start again *lix*

I use GIMP editor. It's free, powerful and works pretty good. I always like to optimize the exposure, contrast, color and crop out unnecessary backgrounds. As an amateur photographer I do that to all my pictures, even back when I used film and had to do it the hard way in the darkroom.

Only once I tried to "enhance" a picture of mine but that was just for fun. I clearly mentioned that in a comment, but at the time I didn't realize SYD/SYC erases comments from time to time. Really, the splice is so obvious anybody can see it! Sad thing is that that's usually always my most popular picture. I suppose most gawkers don't think my real thing is long enough!

I use PS to crop out any unwanted stuff that may appear on the edges. I also tweak the lighting and color from time to time.

Always use it but to fix light shadow, blur background, some black color effect, thing like that, never to make me bigger dont see the point in that