http://www.identifont.com/find?similar=calibri&q=Go

Thanks eliason.
This really helps.

tm

You also could also look for the other works of Luc(as) de Groot, Calibri’s designer: http://www.lucasfonts.com/

I don't know if this is valid but I would also recommend Open Sans, Roboto and Droid. They are all available on Google Fonts and are a free download (If that is a prerequisite?)

At least let's not assume that free is a prerequisite, eh?

hhp

@hrant. Ofcourse. No mention of where he wanted to use. Guessed it was screen because he mentioned Calibri.

Thanks all. Arjun, the font you recommend Open Sans was great as Droid for my client.