I do have several other programs that I seldom use but recently downloaded a free edition of Picasa. What I like about this new software is how fast it is for the basics in post editing and a little more.
I typically spend much more time on an image in my electronic darkroom but this image of Harrah's RIO taken out in Vegas was completed in less than a couple of minutes. Compare that to the sometimes "hours" I have spent using Photoshop and you can see why this could be just the right tool when your time is limited.

I also like the histogram and camera information box at the bottom of the left corner that includes camera type, focal length and apertures used when looking through your archives.
So if you're looking for a free good post-editing program with an easy and intuitive interface, check out Picasa. It won't replace my Photoshop but I will use this program again in certain situations.
As always, if you have any questions please let me know and I will try to answer them, but I think you will see from the beginning this is an easy and fun program to use as soon as you open your first image!
Disclaimer! I do not receive any compensation from Google or Picasa for this recommendation, but maybe I should be..... :)