Alternativas ao Codecall 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 iPad Android Tablet Web Self-Hosted Software as a Service (SaaS)
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial