Public Domain Works Available Online
Obviously, when you start your search for works in the public domain, you will begin your search online. While you can find just about anything and everything that you want online, you should also consider doing some offline searches as well, especially to find public domain works that are more rare – and ultimately more valuable.
This doesn’t mean that you can’t find public domain works that are valuable online as well. In fact, there are literally thousands of resources, and even some commercial directories of places where these works can be found.
You may want to start your online search at the Internet Public Library at http://www.ipl.org. There are numerous books that you can view online on a wide variety of topics.
The Project Gutenberg is another good source at http://www.gutenberg.org/catalog. Archive.org at http://www.archive.org provides over a hundred thousand links to public domain work.
If you are looking for public domain photographs, a great place to start your search is the Library of Congress at http://www.loc.gov/rr/print/ which houses approximately 13.7 million images – all of which are in the public domain. The US Department of Interior also has a nice collection of images at http://www.doi.gov/gallery.html .
The Library of congress also houses public domain broadcasts, motion pictures, and sound recordings at http://www.loc.gov/rr/mopic/. You can find more public domain film at http://www.buyoutfootage.com/pages/pd.html and The Digital Media Bank at http://www.csuchico.edu/lcmt/dmb/imagesources.html.
There is also a lot of software that is in the public domain. A great source for public domain software is The Public Domain Software Library at http://aixpdslib.seas.ucla.edu/ and Source Forge at http://sourceforge.net/index.php .
Finally, Wikipedia has a nice resource for finding public domain works in various genres. Here, you will find a comprehensive list of resources divided into numerous categories. Just choose the category that best suits your needs. Take a look at:
http://en.wikipedia.org/wiki/Wikipedia:Public_domain_resources