Alternatives à Keep In Touch 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 Android Wear iPad Android Tablet Windows S Web Self-Hosted Software as a Service (SaaS) Windows Mobile Wordpress Chrome HP webOS PureOS (Purism)
• Licence Open Source
  Toute licence License gratuite Licence Open Source Licence commerciale