Alternativas ao HEAD para Opera com licença comercial

• Opera
  Todas as plataformas Windows Mac Linux Chrome OS Android iPhone Windows Phone iPad Android Tablet Web Self-Hosted Software as a Service (SaaS) Firefox Opera Safari PHP jQuery Electron / Atom Shell Chrome Microsoft Edge SQLite NGINX Liveweave jsFiddle JS Bin Plunker CodePen
• Licença comercial
  Qualquer licença Licença gratuita Licença Open Source Licença comercial