What is the best software for photos

Question

FIRST TIME I USED A BLOG. NEED YOUR HELP NOT SURE WHAT PHOTO SOFTWARE I NEED .I HAVE A NIKON D3200 .MACBOOK PRO 15 INCH.WOULD LOVE TO LEARN HOW TO TAKE BETTER PHOTO AND USE THE PHOTO FOR LARGE PRINTS IN OUR HOME AS ART WORK.AS WELL AS PHOTO OF OUR CHILDERN.

Answer 1

Terence and daikambu65 addressed already the software options. But your original questions asks about taking photos:
would love to learn how to take better photo and use the photo for large prints in our home as art work.as well as photo of our childern.
This makes me think, you have not yet taken many photos and just bought a new camera.  If that is right, I'd recommend to focus on learning how to take good photos first.  Even the best software cannot help much, if the photo has been taken badly. Image processing software can turn a very good photo into a perfect photo, but poor photos will never be fit to be framed, even with the best software applied. 
First, try to find out what your camera can do and how to use it.  Explore the effects of the available light on the subjects and the depth of field, how to focus on the eyes of a person. Explore, how your photos  will change due to the perspective - when I am taking photos of little children or animals, for example, I'll go down on my knees, to be able to take the photo eye to eye and not from above.  For photos of buildings I try to find a viewpoint, that will show parallel lines in the building also parallel in the photos. One way to learn how to take good photos is to look at professional photos and compare them to what you are seeing when looking through the viewfinder. Observe, how the photos have been cropped to attract the attention to details, how the light enhances the details, how shapes and colors are used.
If you're new to all this you might find iPhoto - which comes free with your Mac -  a good place to start. It's easy to use and covers all the basics.
I second Terence's suggestion.  iPhoto is a great way to get started with digital photography. I used iPhoto from day one it came out, and only switched to Aperture, when Aperture 3 was available.   iPhoto will help you to keep your photos organized in a library and provides a set of easy to use tools for the most commonly required tools to touch up your photos. Straighten the horizon, enhance the contrast, sharpen the image, crop the photo to the relevant section, retouch minor blamishes. This will cover most of the corrections you will need.
And once you know, what kind of post processing and database structure you really need and want, you can easily switch from iPhoto to Aperture, because both programs are sharing the same photo library format. I am still using both applications in turns on the same library.