Alternativas ao ora time and expense para Software as a Service (SaaS) com licença de código aberto

• Software as a Service (SaaS)
  Todas as plataformas Windows Mac Linux Android iPhone Windows Phone Apple Watch iPad Android Tablet Kindle Fire Web Software as a Service (SaaS) Safari Slack Apple Messages Chrome CentOS
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial