November 21, 2011
The Open Library is a project of the non-profit Internet Archive, whose long-term goal is to present "one web page for every book ever published." A recent release of the Open Library brought the total number of book records to over 13.4 million (including over 234,000 records with full-text for the book).
Gracenote "touches hundreds of millions of music fans and TV viewers everyday. The Gracenote database is the largest source of music and video metadata on the planet, featuring descriptions of more than 130 million tracks and TV listings for 28 countries." Recently, Gracenote launched a developer program that opened its Gracenote API to the developer community. The API delivers Gracenote's rich music metadata to any connected app.