Free + Database = FreeBase
1] Free Base is a Worlds Database build by Community of Contribution. The Database is Searchable, Editable and Writable.
2] The Database is open to every one.
3] The Database contains all types of data: Music, Photos, Videos, Tutorial, Wiki style articles, Developers API’s etc.
4] According to Oreilly Freebase will prove addictive for users and developers.