If you're like me and you have blood pressure issues (mine is very low), you have to keep track of what your readings are. Maybe not compulsively so, but you know, on a fairly regular basis. Last year I had to do this four times a day, every day, and I kept a log on a spreadsheet I had saved in Google Docs. It worked great, since I had access to it wherever I went (more or less).
I'm sure there are a few of these, but I read on MedGadget about a new BP monitoring app on the web called BP-Chart. You can log and track your blood pressure, make the information public or private, share it on social media outlets, and even roll it up and send it to your doctor. I haven't tried it out yet, but I'm planning to.
And no, I'm not going to make mine public; it will make some of you wonder whether I'm actually alive. :)