http://appointmentquest.com
Works pretty well, I think it costs $15.00 a months.. Maybe less can't recall. ( they have higher and lower plans.)
Only problem is, I also answer all my incoming calls, and sometimes a double booking will happen when I'm not able to update the online program. But a quick phone call resolves them.
But it has been well worth the money.
I was on vacation at the end of Nov 1st part of DEC.. My greeting explained I was away with family and directed the call to the website for fast booking. Worked well! Never answered the phone during the whole week stay.
The year prior, same vacation... Lost jobs, back log of calls to return.
Requests came in via email, and were approved as time permitted. Came home to a booked calender.
My % on the reply will climb a bit more.. Got 2 more calls today hoping to take advantage of the deal. I figure if they call before the 29th and book in the 1st half of march I will extend the offer. Not their fault I'm booked.