The following sports are listed roughly in "blog order", i.e., more recent seasons are higher. Where data sources are indicated, it is possible that I am not using those sources exclusively, and/or that I have misparsed their data; data errors are not necessarily their fault. Do as you wish with these numbers — I don't gamble on sports, I wouldn't trust these numbers if I did, and I won't accept responsibility for anything you do.
Yahoo-based data is probably missing some neutral-site designators. College football may be missing some overtime data. I don't QA my data much.
If you're interested, Dave Wilson has a nice collection of links. I have a few comments, including a simple transformation for getting point spreads.