Alternativas ao brogress para Kindle Fire com licença gratuita

• Kindle Fire
  Todas as plataformas Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry Blackberry 10 Apple Watch Android Wear Pebble iPad Android Tablet Kindle Fire Web Self-Hosted Software as a Service (SaaS) Firefox Safari PHP Chrome Ruby Gmail GNU Emacs Cloudron Sandstorm.io
• Licença gratuita
  Qualquer licença Licença gratuita Licença Open Source Licença comercial