Alternatives à SageTalk pour Software as a Service (SaaS) avec licence open source

• Software as a Service (SaaS)
  Toutes les plateformes Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry iPad Android Tablet Kindle Fire PlayBook Web Self-Hosted Software as a Service (SaaS) PHP Windows Mobile Apache HTTP Server MySQL Community Edition NGINX Google Apps Microsoft IIS
• Licence Open Source
  Toute licence License gratuite Licence Open Source Licence commerciale