So, if you'd rather not see your images bought and sold by Facebook, or legally speaking Facebook licensing your images to others without your permission, I suggest it's time to abandon Instagram and look for a replacement.
If all you want to do is just add cute filters to your photos, and then manually upload them to Twitter, Google+, or e-mail them to aunt Flo, there's an numerous programs, such as Adobe Photoshop Elements that will meet your needs. If you want easy to use, quick filters, and built-in social network integration, here are the programs my photo-loving friends recommend.
In particular, the new Flickr iPhone app is looking really sweet. Yahoo promises that they'll be a version for Android coming out soon. I'm looking forward to trying it out. Like the sounds of that, but don't want to move all your images?, A new service, freethephotos, has just been released to automate migrating your images from Instagram to Flickr.
I'm an awful photographer, but Camera+'s tools go a long way to making me into... well OK a mediocre photographer, but still better than I had been. People who are far more serious about their photography will also appreciate its numerous higher-end features.
One unique feature is that it lets you take take front-facing photos in low-light on an iPhone. How does it pull this trick off? By using your iPhone/iPad display as one giant flash. Now, if only Camera+ was available on Android devices I'd love it.
Backspaces is another iPhone only app but since it's open-source, it may not stay that way. The nice thing about Backspaces is that, besides all the usual funky filters, it makes it easy to upload multiple photos into stories. If the idea of telling stories through images appeals to you, you should check this program out.