Alternativas ao Todost para todas as plataformas com licença de código aberto

• Todas as plataformas
  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 BSD Microsoft Office Outlook Chrome Gmail GNU Emacs Cloudron Trello Sandstorm.io
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial