Alternatívy programu Bookis pre Apple Calendar s komerčnou licenciou

• Apple Calendar
  Všetky platformy Windows Mac Linux Chrome OS Android iPhone Windows Phone iPad Android Tablet Web Self-Hosted Software as a Service (SaaS) PHP jQuery Windows Mobile Slack Microsoft Office Outlook Chrome Google Calendar Sunbird Google Apps Microsoft Exchange Server Apple Calendar
• Obchodná licencia
  Akákoľvek licencia Bezplatná licencia Licencia Open Source Obchodná licencia