1. Visual Studio Professional, Premium or Ultimate with MSDN subscriber
you get free access to Windows Azure each month, and up to $3,700.00 in annual Windows Azure benefits at no extra charge. Click HERE for more info or HERE to download the Windows Azure SDK
2. Members of Microsoft programs such as Microsoft Partner Network, or BizSpark
You get free access to Windows Azure as part of your membership benefits. You get free access to Windows Azure as part of your membership benefits. To find out more visit the Member Offers page http://www.windowsazure.com/en-us/pricing/member-offers/
3. If you just want to sign up a free 90 day Windows Azure trial account
Click here to sign up.
4. Of course, you can choose “Pay as you go” or the “Six Months Plans”.