I've put together a list of a few apps I find handy. I assume many of them are available on the Android Market, but I've only linked them up to the Apple iTunes store here. All of them are free as well.
This app is pretty cool, and I imagine it works pretty well in most major cities. It uses your current location to find local restaurants that have veggie/vegan options. It also has user reviews and star ratings all inside the app. Great for traveling or if you just wanna try something new.
I love this cookbook, and amazingly she has all her recipes on the app as well. Plus, each recipe has an interactive checklist for shopping, and of course, the beautiful step-by-step photography.
This app makes it SUPER easy to take action for various causes. Open it up, select a cause you want to help out with, it automatically populates and email with your info and a pre-written letter and you just hit send! Easy as that.
In case you ever want to prove to anyone the horrific conditions that exist in factory farming and puppy mills, etc., this app aggregates all of the great work the Humane Society has done.