I need the names of some companies that have done web usability and webdesign?

[Dayo]

for some of social media sites. I Need the names of a few firms that have done work with some web 2.0 firms e.g mint.com, twitter, facebook or has experience with usability studies and social media webdesign

[AbdelRahman]

MetaLab Design (http://www.metalabdesign.com)

[Andy]

There is a website design company from India, Xigmapro Software. They are very good in terms of webdesign.

You can know everything about this company by visiting their website. I am providing you their web-url: http://xigmapro.com