Checkfront - Checkfront is built for Tour & Activity Operators, Rental companies and Accommodation providers. Manage your inventories online, centralize reservations, process payments and get unified access to leading distribution channels.
Remind1 - Save nerves, time and money - send automated appointment reminder messages from the calendar you already use. Google Calendar & Outlook / Office 365 Integration.
hoo - hoo is the only hotel booking platform that lets users Make an Offer on the hotel rooms they want to stay in.
Remindy.me - Never forget anything!
Mobile-Calendar - Reservation management system. If you rent accommodation, the mobile-calendar app was made for you!
Appointment Reminder - Automated SMS/Voice and Email Reminders.