Alternativas ao FullCalendar para Slack com licença de código aberto

• Slack
  Todas as plataformas 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
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial