Peek Pro - Peek Pro is a fastest growing appointment scheduling software specially designed for tours and activity operators to help increase their booking reaching out to large numbers of potential customers, mostly tourists.

Baïkal - Cal and CardDAV server

Eventric - Eventric is an professional tour management solution.

Radicale - The Radicale Project is a complete CalDAV (calendar) and CardDAV (contact) server solution.

iVector - iVector's flexible functionality allows to improve the traditional strengths of tour operators, customer service, quality and brand while enhancing existing product and pricing strategy.

DAViCal - DAViCal is a server for calendar sharing.