Alternativas ao TASK.CAT para Linux com licença de código aberto

• Linux
  Todas as plataformas Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry Blackberry 10 Apple Watch Android Wear iPad Android Tablet Kindle Fire Windows S PlayBook Web Self-Hosted Software as a Service (SaaS) Firefox Opera Safari Internet Explorer PHP JavaScript BSD Windows Mobile Wordpress Slack Apple Messages Chrome Ruby HP webOS Microsoft Office 365 Gmail Joomla Apache HTTP Server MySQL Community Edition AngularJS Redmine Cloudron Microsoft Azure Go (Programming Language) Google Apps Jira Trello Google Play Store Microsoft SharePoint Zapier VirtualBox Install Chrome Extensions Google Chrome to Phone Todo.txt Sandstorm.io Evernote Aha! Priority Matrix Roadmap Planner
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial