Set Phasers to Buy

I don't generally review products on the blog, for a lot of reasons. Mostly it's because I don't want to waste my time or yours with negative reviews of stuff that made me cranky somehow (like a sky mapping app I tried recently that refused to let me use my current location, instead insisting I was in Australia) -- especially when I have a sneaky suspicion the problem is my fault but I can't trace it. On the other hand, sometimes truly cool stuff comes along, and it's a pleasure to write somethi...