Alternativa UserEchou za Google Apps sa licencom otvorenog koda

• Google Apps
  Sve platforme Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry Blackberry 10 iPad Android Tablet Kindle Fire Windows S PlayBook Web Self-Hosted Software as a Service (SaaS) PHP Windows Mobile Chrome Google Apps Microsoft SQL Server Microsoft SQL Server Express ASP.NET MVC Microsoft IIS
• Licenca otvorenog koda
  Bilo koja licenca Besplatna licenca Licenca otvorenog koda Komercijalna licenca