Alternativas ao Grassy para Ruby com licença comercial

• Ruby
  Todas as plataformas Windows Mac Linux Chrome OS Android iPhone iPad Android Tablet Web Self-Hosted PHP JavaScript Python BSD Ruby Node.JS React Dropbox Cloudron ZeroNet Vue.js MongoDB Evernote NameCoin Markdown CoffeeScript Jekyll
• Licença comercial
  Qualquer licença Licença gratuita Licença Open Source Licença comercial