We use Blue Jeans of course !!! I was actually able to move out of my office and work predominantly from home.
We use mostly cloud collaboration tools such as Google Apps with a mix of opensource alternatives such as etherpad and ethercalc, we use our opensource Phone system so all associates can either have a softphone or hardphone at home ( i actually have a video phone that connects to Blue Jeans over SIP)
Most of my work and meetings are with the folk on the east coast, so living in the UK this used to be exhausting before Blue Jeans came about.