Alternativa Springseedu za Kindle Fire s komercijalnom licencom

• Kindle Fire
  Sve platforme Windows Mac Linux Chrome OS Android iPhone Windows Phone Apple Watch Android Wear iPad Android Tablet Kindle Fire Windows S Web Self-Hosted Software as a Service (SaaS) BSD Xfce PortableApps.com Chrome
• Komercijalna licenca
  Bilo koja licenca Besplatna licenca Licenca otvorenog koda Komercijalna licenca