Spool was a free
social bookmarking program and
social network that was launched in October 2011 at TechCrunch Disrupt. The service allowed users to cache a webpage, including any media on the page, for offline consumption on any mobile device. Spool raised over $1 million from angel investors in January 2012.
Facebook acquired Spool in July 2012, in what was rumored to be a very competitive process.