You can find many fonts to insert the Indian Rupee (INR) symbol in your documents. All existing fonts have the same problem: they work only on your computer. If you send that document to someone who does not have that particular font (e.g. foradian.com’s font) or upload it to Google Docs (or any other cloud based service) – the INR symbol will not render there, and the grave accent symbol (`) will appear. Also, the process of inserting the INR symbol is very difficult with such fonts – as you will have to change the font of ` character every time.
Thanks to Raju Das for developing a better solution for the above problems. Raju has created a new font for INR symbol which works in a different manner. Raju describes his font as:
To insert the symbol with other fonts just type the assigned key, change the font, done! Sounds simple, but there’s a catch. Every time you need to insert the symbol, and change the font for that symbol, then change the font back for the rest your text. Moreover, if you select the whole text and change the font, the symbol font will change to actual the character that it was mapped to, like if it mapped to # sign, # will appear in the text instead of the new Rupee sign.
I have mapped the sign to the Rupee (Rs) sign (already) available in Unicode character set, which is embedded to Unicode character U+20A8. So, if you send a file containing the symbol to someone else, and if that person does not have this font installed, the old Rs. symbol will be shown on that person’s computer instead of the new symbol or any assigned character.
To test this, I uploaded a word document to Google Docs containing both – foradian.com’s font and Raju’s font. You can see the actual document here, and below is the screenshot of it:

Cool! To download Raju’s font and see the use instructions, visit this link.
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Also see this: http://axemclion.github.com/rupee/
I love this font.