I have two cameras I use regularly.
A Nikon D80 w/ a variety of lenses and lighting situations. This is my baby that I love and would cart everywhere for all pictures if it were practical. Unfortunately with three kids - adding a large camera bag to go to the grocery store isn't always feasible.
Which is why I also have a Nikon Coolpix to take with me for everyday things. When we're at home, I usually grab whichever one is closest to me at the time.
When all else fails I do have a camera on my cellphone as well but I don't use those pictures that often. Still you may see one now and then.
I edit my pictures using Picasa and Photoshop primarily but I also have Gimp, which I'm still learning to use.