I am new to the whole Mac thing after using a PC all my life. I am learning new things everyday about my MBP. My question is, what are some good applications I can download for free on the Apple website? Any good apps that can clean-up my MBP to make it run faster, anything that might help it from viruses...anything cool that has to do with music and sports, battery health, etc. Just anything useful that you guys really like and would recommend. Any help is appreciated. Thanks!