This free website can do almost anything. For example: If it's going to rain tomorrow then text me.
I use it to automatically download instagram photos to my laptop and to automatically upload instagrams to Facebook.
This is pretty straight forward. Just go to ifttt.com and the site will walk you through how to get your IGs automatically to Facebook.
To automatically download IGs to your PC or Mac you'll need a dropbox account. If you've got one, go to ifttt.com to set up the auto download. If not, click here to go to my dropbox page.