The three that I prefer are:
I will be trying these out at some point:
Recommend any others?
DrChrono.com co-founders Michael Nusimow and Daniel Kivatinos present DrChrono.com at the Health 2.0 New York Chapter.
Below are some additional pictures from the chapter meetup.
John Phelan from Zweena Health was a speaker at the meetup.
Mark Hurst from Gel was at the meetup, he is the organizer of the Gel Health Conference.