To attract small and medium scale companies to their Adwords program, Google is giving a free Rs 1000 voucher to any new Adwords customers in India. Though it's the first time that Google Adwords launched Free voucher codes in India, the company has regularly been offering free vouchers in in other countries (see links below)
A new advertiser can activate their AdWords account with just US$5.00 (INR 225), and can then choose a maximum cost-per-click (CPC) from US$0.01 - US$100.
Rs 1000 Google Adwords Voucher
50 Euro Adwords Vouchers: Sweden, Italy, France, France, Netherlands
Google Adwords Japan - 4000 Yen Voucher