Send Me a Sample has a link offering free GoMacro snack bars. I'd never heard of these before, but the image says they're oatmeal chocolate chip bars that are organic, vegan, and gluten-free!
It's pretty rare to find something that's both vegan and gluten-free (I sadly know from personal requirements), so I'm really excited to try these! All I had to do was log into my Send Me a Sample account, then click the link and it auto-requested a freebie for me.