Alternativas ao Arcade City para Self-Hosted com licença de código aberto

• Self-Hosted
  Todas as plataformas Windows Mac Linux Android iPhone Windows Phone Blackberry 10 Apple Watch Android Wear iPad Android Tablet Kindle Fire Web Self-Hosted Slack Telegram bot API
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial