Alternativas ao Taskian 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 Blackberry Blackberry 10 Apple Watch iPad Android Tablet Web Self-Hosted Software as a Service (SaaS) Firefox Opera Safari Internet Explorer BSD PortableApps.com Chrome HP webOS Firefox OS GNU Emacs Termux
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial