Hardware is expensive to develop; software is cheap. That's why the Angel sensor, an open source fitness band, has the potential for being extremely important. The Angel is raising money on Indiegogo, and (as of this writing) has raised more than $200,000 of its original $100,000 goal, with 9 days to go. So the thing is a hit. Or, at least, there'll be enough money to get … [Read more...]