Mobile Workforce is the reality and future

IDC Forecasts U.S. Mobile Worker Population to grow from 96.2 million (61%) in 2015 to 105.4 million (72.3%) by 2020! 

hubEngage is primarily for internal use by relatively large organizations.

Breather primarily the need for office on deman in metropolises where rent is high.  It charges $30/hr, so it is more for groups than individuals.

Bluescape is a nice visual tool for remote collaboration.  For quick communication, Skype should be sufficient.

Repsly is a mobile CRM for field staff