Teamup Calendar - Cloud-based calendaring using capability URL, application developed in Zurich, Switzerland.
When2Meet - When2meet helps you find the best time for a group to get together. It is a free survey tool that is quick and easy to use.
Campaign Calendar - Campaign Calendar by Bracket Labs builds a marketing calendar from your Salesforce Campaigns.
x.ai - x.ai is a tool to schedule meetings for you and your team.
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.
WhenAvailable - WhenAvailable is an excellent event management tool that allows scheduling the dinner party, book club meeting, and guys’ night out with simple and best ideas.