Alternatívy programu ZenOK pre Microsoft Office Outlook s licenciou s otvoreným zdrojom

• Microsoft Office Outlook
  Všetky platformy Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry Blackberry 10 iPad Android Tablet Kindle Fire Windows S Web Self-Hosted Software as a Service (SaaS) Firefox PHP JavaScript Xfce Wordpress Microsoft Office Outlook Chrome HP webOS Motti.NET (Programming Language)
• Licencia Open Source
  Akákoľvek licencia Bezplatná licencia Licencia Open Source Obchodná licencia