As Google and Facebook provide more robust services and better tools for developers to access them, the range of solutions available to small businesses increase significantly.
We have recently supported small companies (5 employees or less) build sophisticated calendar applications that handle bookings and payments across timezones, and link the website to the inhouse desktop productivity tools.
This is a powerful solution for small businesses that deliver services. If you would like to know more, comment below or contact me through the contact page.