Build Point systems tend to be math heavy, and that makes it especially difficult when playing with kids. Even with advanced degrees, I prefer to let computers to my math for me. Over the years I've used several spreadsheets for several systems, such as the Shadowrun Character Generator Spreadsheet at the bottom of Aaron's Shadowrun Resources Site. It not only keeps me honest, but it means I don't make silly arithmetic mistakes.
Does anyone know of such a beast for M&M 3.0?
Note: I've found Hero Lab, and I would shell out the money it but I run Linux and the demo I downloaded from their site has a tendency to crash under wine. I don't know if it does the same under Windows, or if the licensed version similarly crashes, but I hate spending money on software that crashes.