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

• Software as a Service (SaaS)
  Todas as plataformas Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry iPad Android Tablet Kindle Fire Windows S Web Self-Hosted Software as a Service (SaaS) Windows Mobile Wordpress SnapChat
• Licença gratuita
  Qualquer licença Licença gratuita Licença Open Source Licença comercial