Cronofy - Unified Calendar API for developers
Testsigma - Complete AI-driven Test Automation platform for Web apps, Mobile apps and APIs. Simple English commands to automate complex tests easily and effectively with all the flexibility that enterprise teams need!
Calendarix - Calendarix is a powerful and easy to use web-based calendar that runs on PHP and MySQL.
RainforestQA - Insanely simple testing. Create tests for your website in plain English, then run them across all major browsers with a single click. Powered by human intelligence
Campaign Calendar - Campaign Calendar by Bracket Labs builds a marketing calendar from your Salesforce Campaigns.
Bunch - Bunch is a simple web dashboard that integrates with your teams' calendars.