Alternativ till XXL Cloud / XXL Box för Microsoft Office Outlook med öppen källkodslicens

• Microsoft Office Outlook
  Alla plattformar Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry Apple Watch Android Wear iPad Android Tablet Kindle Fire Windows S Web Self-Hosted Software as a Service (SaaS) Firefox Xfce Microsoft Office Outlook Raspberry Pi Chrome Cloudron
• Open Source-licens
  Eventuell licens Gratis licens Open Source-licens Kommersiell licens