Alternativas ao SiteSupra para Google Drive com licença de código aberto

• Google Drive
  Todas as plataformas Windows Mac Chrome OS Android iPhone iPad Android Tablet Web Self-Hosted Software as a Service (SaaS) Wordpress Chrome Web Store Google Drive Ruby on Rails Amazon Elastic Compute Cloud
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial