Google–Search Engine-Open any file via Google Docs Viewer

Previously, you can view only websites in your browser but, now you can open any file in your browser when file being index on Google results via Google doc.

such as 

• PDFs,
• Microsoft Word documents
• PowerPoint presentations
• Microsoft Excel (.XLS and .XLSX)
• Microsoft PowerPoint 2007 / 2010 (.PPTX)
• Apple Pages (.PAGES)
• Adobe Illustrator (.AI)
• Adobe Photoshop (.PSD)
• Autodesk AutoCad (.DXF)
• Scalable Vector Graphics (.SVG)
• PostScript (.EPS, .PS)
• TrueType (.TTF)
• XML Paper Specification (.XPS)
  
  
  

suppose you have docx file but you don’t have Microsoft office installed with you then you can upload to Google doc and view it in your browser.

you can download it locally in browser and can save it hard disk also

More information can be found here.

12 new file formats in the Google Docs Viewer - Official Gmail Blog

Why not to use Gmail?

5 reasons not to use Gmail


1. You can't all Gmail feature at all internet speed
2. At times, when you click on a mail from the list , the page keep on loading for long time.
3. Temporary failure of Gmail service at times may force you to use alternate email service provider
4.Sometimes your friend's email skip inbox to spam box for no reason
5.when you can't search previously sent message using search mail box

Hacking GMail (ExtremeTech)