lvrealtor, there is no "one click fixes the pic" software out there that can get the results you are looking for, and trust me, the photos displayed here show a lot more skill and care than the average realtor photos display.
If you want to manually "add lights"...well you're not going to get that with a quick edit either.
I use Photoshop 7 and I have years into learning the software. But for quick editing you can do pretty well with Picasa, which is a free download from Google.
neudot, I disagree with you completely. Lights can manually be added with software. Below are two images of a house which lights were added with software. The first picture has not lights and it is the original picture. The second picture below has lights added and the surroundings were also touched up with one click software.
I'm not sure which software they used to alter the image. The realtor refused to tell me. But anybody can see for themselves below that lights were added to the house and the ouside was darkened to appear to be dark outside. Also, the images are exactly the same angle of the camera. The lights were added to the garage where there are no lights on the garage of that house(I am familiar with that house). I know a previous listing agent and that house does not have all those lights on the outside. That house has lights on the front door "only".
And picassa does not add lights. Picassa does the same thing as microsoft's free mspaint which comes free on all windows xp computers.
So if anybody knows what software they used to add the lights below, then please share with the rest of us.