Alternativ till Kitabu för Software as a Service (SaaS) med gratis licens

• Software as a Service (SaaS)
  Alla plattformar Windows Mac Linux Android iPhone Windows Phone Blackberry iPad Android Tablet Kindle Fire Windows S Web Self-Hosted Software as a Service (SaaS) Firefox BSD Windows Mobile Java Mobile F-Droid S60 Pale Moon Chrome HP webOS Moodle
• Gratis licens
  Eventuell licens Gratis licens Open Source-licens Kommersiell licens