Alternativas ao EventsApp para Software as a Service (SaaS) com licença comercial

• Software as a Service (SaaS)
  Todas as plataformas Windows Mac Android iPhone Windows Phone Blackberry Blackberry 10 iPad Android Tablet Web Software as a Service (SaaS)
• Licença comercial
  Qualquer licença Licença gratuita Licença Open Source Licença comercial