which are the sites giving free online certification in .NET?

There are many sites available online but brainbench.com is the to my knowledge.
It gives offers to the readers of the site now and then and you can take a print out of the marks as soon as you are done.Moreover it ranks you with all who have taken the test before.

There are so many sites. Details of the Dot Net Fundamentals Test are as follows;
1, Syllabus : -
Fundamentals
Domain
Application Domain
Deployment
GC
CLR
CTS
Deploy
Remoting
Assembly
2, Duration : - 40 min
3, No. of Questions : - 40 multiple choice questions.
Each question has between 2 and 8 options out of which 1 or more may be correct.
4, Pricing and Payment Options: - $9.95 US payable through any of the following:
Secure online credit/debit card transaction
e-Check (requires a US bank account)
Paypal
Other payment options can be made available in special cases.
5, If you are unable to pass the Dot Net Fundamentals Test or you wish to improve your score, you may re-appear by paying $5.00 only.

Just go through the following links also;
www.expertrating.com/certifications/dotnet-fundamentals.asp

www.dotnetspider.com

www.expertrating.com/certifications/Dot-Net-Nuke-Test.asp

www.dotnetspider.com/sites/7/-Microsoft-Certification.aspx

www.pa-educator.net

Write online exam and get the FREE Professional certificate instantly. .Net - C# , VB, ASP, Win form, Database Sql Server 2000,2005,My Sql, Oracle, J2EE, PHP , OS Windows XP , Linux ,Testing, html, Medical billing and more.

http://ranksheet.com/