I try to avoid packaged or processed foods, but if I'm in a pinch for a snack (especially one that travels well in my purse), I turn to the Larabar, which contains fruit and nuts and that's about it. They are gluten free, dairy free, soy free, non-GMO, vegan, and kosher.
My favorite is called Cherry Pie. The ingredients: date, almonds, unsweetened cherries. Yep. That's it!
Peanut Butter Cookie contains dates, peanuts, and salt.
Cashew Cookie has cashews and dates. Nothing else.
Coconut Cream Pie is another favorite of mine and it has a few more ingredients: dates, unsweetened coconut, almonds, cashews, and extra virgin coconut oil.
They have a large variety of flavors such as banana bread, carrot cake, ginger snap, key lime pie, lemon zest, apple pie, basically made with just fruit and nuts. Some additional bars come with chocolate chips in them, but I avoid those since the chocolate chips have sugar. One bar, the Chocolate Coconut Chew has unsweetened cocoa powder and no sugar, so I might give that a try sometime, but I am always leery -- too afraid because of my addictive tendency. (If it the chocolate tastes tooooo good, then I might not want to stop eating them.)
I usually purchase Larabars at Whole Foods since they often have a sale 10/$10. Some grocery stores carry them (Winco, Smith's, Wal-Mart) but with very limited selections. I am told Costco carries them, but I haven't checked on that.
Here's their website if you want to browse through all the flavors and ingredients! Click: LARABAR.