CozyCal - Online appointment scheduling
Chat Bots Weekly - A weekly curation of everything important in chat bots
Sorted - Sorted³ has been crafted to make scheduling quick and easy. Try it for a few days and it may very well become a productive, yet enjoyable part of your day.
Botkit - Botkit is an open source developer tool for building chat bots, apps and custom integrations for major messaging platforms.
RobinPowered - Robin coordinates meeting spaces, people, and things in your office. Complete with analytics and insights that uncover usage and help optimize space.
Meya.ai - Build, train and host sophisticated bots.