Teamup Calendar - Cloud-based calendaring using capability URL, application developed in Zurich, Switzerland.
Hugo - Hugo is a general-purpose website framework for generating static web pages.
Campaign Calendar - Campaign Calendar by Bracket Labs builds a marketing calendar from your Salesforce Campaigns.
Notion Meeting Notes - Organise your meeting notes in Notion
ApPHP Calendar - ApPHP Calendar is a PHP calendar script that may be easily integrated and used with various PHP projects, such as schedulers, event, etc.
Mastermind Manager - Software for running mastermind groups