The Google Data Liberation Front is an engineering team at Google whose "goal is to make it easier for users to move their data in and out of Google products." The team, which consults with other engineering teams within Google on how to "liberate" Google products, currently supports 27 products. The purpose of the Data Liberation Front is to ensure that data can be migrated from Google once an individual or company stops using their services.
Google Takeout
On June 28, 2011, Google's Data Liberation Front engineering team released their first product, after 4 years in development, called Google Takeout, which allows a Google user to export data from supported services.
Google Takeout has been criticized for failing to include many Google services.
References
Google Data Liberation Front Wikipedia(Text) CC BY-SA