Explorer QRZ-1
This radio is the free one provided by QRZ. It's a no-frills, functional little bugger, and boy oh boy, does it function.
Despite my FT-70DR being a "better radio", the QRZ-1 just works for everything I need it to. No, it can't natively talk on digital modes, no, it doesn't have built-in APRS (like the GD-88 supposedly does), but it just works. I have details about how I've used it for APRS over in that section.