I do like the looks of the one linked by Coding - that scope function is interesting. C-B - how does the scope program work for you?
I have not yet had the need nor opportunity to use it. I've used everything else: the programmer, the TTL serial, and the "pass through" +5 volts. I soldered a male header into the six pins on the side so it can be plugged into a breadboard.
One of the things I really like about the Pololu programmer is the very small size. It's about the same size as the big USB connector. I roll up the programmer with a USB cable attached and pack it away for travel.