Alternativas ao Shadow Daemon para Software as a Service (SaaS) com licença gratuita

• Software as a Service (SaaS)
  Todas as plataformas Windows Mac Linux Web Self-Hosted Software as a Service (SaaS) BSD VMware vSphere Hypervisor Microsoft Hyper-V Server NGINX VirtualBox Proxmox Virtual Environment
• Licença gratuita
  Qualquer licença Licença gratuita Licença Open Source Licença comercial