Convert any files to PDF,Word etc... (using Google)

One of the best way of sending a documents with write protect is through PDF. Because PDF files cannot be changed or edited , so most of the people choose PDF. To make the PDF files you need applications , but Google offers it for free for converting any documents to PDF. All you need to have is Gmail Account.
Just Follow the steps :
Step1 : Google to http://docs.google.com .
Step 2: Login using your Google Account.
Step 3: Upload the file that you want to be converted into PDF / Word etc...

Then Drag and Drop the files which you want to convert.

Step 4: Go to file -> Action -> Download as...

These are the file types that can be converted to Google Docs:
For spreadsheets: .xls, .xlsx, .ods, .csv, .tsv, .txt, .tsb
For documents: .doc, .docx, .html, plain text (.txt), .rtf
For presentations: .ppt, .pps (.pptx and .ppsx is not supported)
For drawings: .wmf
For OCR: .jpg, .gif, .png, .pdf

*If you want to Know more about Google Docs:- 
Google Docs