It's virtual Japanese pop idol Hatsune Miku. You might not have heard of Miku, but it (I'm just not comfortable calling it ...

Anthony Mendelson built a phone-free music player for runners that unexpectedly became popular with parents and kids.

Need a compact, capable projector you can take with you for presentations on the road—or just tote from room to room, or to the backyard for movies? Here's a look at the top-rated models we've tested.