Alternativas ao MeetApp para Linux com licença comercial

• Linux
  Todas as plataformas Windows Mac Linux Chrome OS Android iPhone Windows Phone iPad Android Tablet Web Self-Hosted Software as a Service (SaaS) jQuery Windows Mobile Slack Microsoft Office Outlook Chrome Google Calendar Google Apps Microsoft Exchange Server Apple Calendar
• Licença comercial
  Qualquer licença Licença gratuita Licença Open Source Licença comercial