Google Refine is a open source tool for working with datasets, including but not limited to Freebase. According to David Huynh, Google Search Infrastructure, it can be used for: “cleaning up inconsistencies, transforming them from one format into another, and extending them with new data from external web services or other databases.”
How to Install-
For Windows users, Once you have downloaded the .zip file, uncompress it into a folder wherever you want.
run the .exe file in that folder. You should see the Command window in which Google Refine runs. By default, the Command window has a black background and text in monospace font in it.
For Mac OSX user, once you have downloaded the .dmg file, open it, and drag the Google Refine icon into the Applications folder icon (just like you would normally install Mac applications).
For Linux users, Once you have downloaded the tar.gz file, open a shell and type
tar xzf google-refine.tar.gz