Alternativas ao Taskr para Software as a Service (SaaS) com licença de código aberto

• Software as a Service (SaaS)
  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 BSD S60 Chrome Ruby Gmail React GNU Emacs Cloudron
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial