Maps in the public domain (There is a few links to news and misc. resources for the time being.)
CIA Maps — Central Intelligence Agency Page Size Base maps are in the public domain. Accordingly, they may be copied freely without permission of the Central Intelligence Agency (CIA).
David Rumsey Historical Map Collection (CC BY-NC-SA 3.0)
Free Map Viewer (CC0 1.0)
GinkgoMaps.com - Free Digital Maps
Map Library The Map Library is a source of public domain basic map data concerning administrative boundaries in Africa. The data is broken down into manageable chunks to make it easier to download for those with poor internet connections.
Mapswire.com Public Domain Maps
Natural Earth a public domain map data set available at 1:10m, 1:50m, and 1:110 million scales. Featuring tightly integrated vector and raster data, with Natural Earth you can make a variety of visually pleasing, well-crafted maps with cartography or GIS software.
Nautical Charts NOAA provides about a thousand high-resolution printable nautical charts — almost the entire NOAA suite of charts — as PDF files. The PDF nautical charts are exact images of NOAA’s traditional nautical charts.
Oregon State University Maps Online
Public Domain Maps Maps of the Mediterranean World in Late Antiquity
California Digital Newspaper Collection - A project of the Center for Bibliographical Studies and Research (CBSR) at the University of California, Riverside. This is a freely accessible repository of digitized California Newspapers from 1846 to the Present - it contains 200,005 issues comprising 2,102,902 pages and 17,536,359 articles.
Chronicling America - (Library of Congress collection) A Website providing access to information about historic newspapers and select digitized newspaper pages, and is produced by the National Digital Newspaper Program (NDNP).
Common Dreams - providing breaking news & views for the progressive community since 1997. We are independent, non-profit, advertising-free and 100% reader supported. Creative Commons Attribution-Share Alike 3.0 License
Historical U.S. Newspapers Online A guide to historical U.S. newspapers that are freely available on the Internet.
Historical Worldwide Newspapers Online A guide to free Internet sources of historical newspapers.
Public Domain Resources without a category
The Open Prosthetics Project - Dedicated to facilitating crowd-sourced curation of information and collaboration in the field of prosthetics and coping with missing body parts in general. (CC BY-NC-SA 4.0)
HACCP Plans — Open Source Food Safety - Hazard Analysis and Critical Control Points (HACCP) is a preventative approach to food safety that identifies hazards in the production process and provides steps to reduce the risk of their occurrence.
Sam Loyd's Cyclopedia of Puzzles - Sam Loyd's Cyclopedia of 5000 Puzzles, Tricks, and Conundrums (With Answers)
WorldofSharks.net - (CC BY-NC-ND 2.5 IN)
American Hospice Foundation - Library of Resources (CC0 1.0)