Alternativas ao ZeroTalk para Android com licença de código aberto

• Android
  Todas as plataformas Windows Mac Linux Android iPhone Windows Phone iPad Android Tablet Web Self-Hosted Software as a Service (SaaS) PHP JavaScript Python Docker Ruby Node.JS C++ Bitcoin Apache Cordova JSON Go (Programming Language) Redis MongoDB Flask IPFS
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial