Alternativas ao ACT! 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 Apple Watch Android Wear iPad Android Tablet Web Self-Hosted Software as a Service (SaaS) PHP JavaScript Microsoft Office Outlook Chrome Gmail Cloudron Microsoft Office Suite
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial