Holiday Lettings

About:

In 2010 holidaylettings gained the backing of Trip Advisor, the world's largest travel site. Now owners can show off their guest reviews and get their properties promoted on a worldwide network of 25 TripAdvisor websites surfed by 340 million travelers every month.

Integration: 

holidaylettings is a two-way integration, meaning you can synchronize your calendars with other parties to reflect the same availability using iCal.

NB: iCal based integrations are not real-time and carry delay in availability updates from showing.