we use
http://www.realestateshows.comOur company got a discount, and one of our mortgage guys agreed to subsidize part of the cost in exchange for an ad at the bottom of the tour.
I love it because it offers a LOT! I pay, after our brokerage discount and the subsidaztion by the mortgage guy, $25/year for unlimited tours. Even without the discount and subsidy I would pay the $129/year for it. Here are examples of my tours.
Perky's Pike And Wayne County PA Real Estate Virtual Tours!I like it because I can create flyers (for online use such as on ActiveRain or Craigslist) or to print (not so hot for printing but good enough.) You can automatically create a file to put on youtube. It will syndicated to Trulia, Housepad, Zillow, etc..You can add extra photos, make community tours, etc.