Texas Reference Center - Articles on Texas history, ethnic and cultural diversity, gender studies, literature, public health, business, sports and leisure activities, and biographies of famous historical and contemporary Texans.
Digital Sanborn Maps - Detailed property and land-use records depicting the architecture of Texas towns and cities throughout the past hundred years.
Global Stat - offers statistical information on globalisation, sustainability and human development. Focusing on the economic, environmental, political, social, societal and cultural performance of nations.
ArrivalGuides.com - Billing itself as “the world’s largest network of free travel guides,” Arrivalguides is unique in that it’s entirely web-based, and all of its guides are available as free, high-quality PDF downloads.
Frommers published one of the first travel guides (the 1957 Europe on $5 a Day). Founder Arthur Frommer still actively blogs on the site, offering unique perspectives on the travel industry sharpened by decades of observation.
Wikitravel is an open source worldwide travel guide with more than 23,000 destination guides and other articles written and edited by Wikitravellers from around the globe.