Alternativer til FullCalendar til Slack med gratis licens

• Slack
  Alle platforme Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry iPad Android Tablet Web Self-Hosted Software as a Service (SaaS) PHP jQuery Windows Mobile Wordpress Slack Microsoft Office Outlook Facebook Messenger Chrome Magento Community Edition Squarespace Adobe Flash Player Google Calendar Google Apps Zapier MINDBODY Weebly Microsoft Exchange Server Apple Calendar
• Gratis licens
  Enhver licens Gratis licens Open Source-licens Kommerciel licens