Various resources of Creative Commons and Public Domain media.
A huge resource of different media, released under a range of licenses.
Public Domain Review
A very useful site with links to sources of public domain media.
Another huge resource of media released under various licenses.
A whole bunch o’ free eBooks. A very large archive of classic literature in a number of digital formats including HTML, ePub and Kindle.
Project Gutenberg also has a self-publishing portal, so you can add you own books.
UK Copyright Service
Information about copyright law in the UK, including a very useful fact sheet.
Details about exactly what you can and cannot do under the various flavours of Creative Commons licenses.