A Collected Assortment of Possibly Useful Links
Calculators, Converters, and Similar Tools
Online Scientific Calculator: For when you don't have a calculator handy and need to do some math.
Calculators: A collection of geometry, trigonometry, mathematical, scientific and other calculators
Online Conversion: Convert just about any units you can think of.
Online Apps, Converters, Calculators, Charts, and General Information: Online collection of calculators, apps, conversion charts, informational tables and converter programs.
Science Apps, Converters and Calculators: Extensive list of science based apps, calculators, conversion charts and converter programs. Sub page of the above.
Specialty Tools and References
Drake Equation: Calculator for the Drake Equation.
Hard SF Tools: Archived copy of a variety of hard science fiction tools.
Antimatter Calculator: Just for fun, calculates the energy from matter/antimatter explosions.
Geography and Area and Country Studies References
Library of Congress Collection of the Federal Research Division's Country Studies/Area Handbook Series: Extensive collection of books describing the historical setting, geography, society, economy, political system, and foreign policy of various country/regions
Country Studies: Country Studies/Area Handbook Series Federal Research Division of the Library of Congress and sponsored by the Army, with describing the historical setting, geography, society, economy, political system, and foreign policy of various country/regions. Overlaps with the above.
CIA World Factbook
Legal and Human rights Resouces and References
United Nations Universal Decleration of Human Rights
The Office of the United Nations High Commissioner for Human Rights's 9 Core International Human Rights Instruments
The Office of the United Nations High Commissioner for Human Rights's Human Rights Instruments: Long list of treaties and othe international human rights instruments.
University of Minnesota Human Rights Center and Library: Extensive collection of human rights laws, treaties, and links.
Cornell University Law School Legal Information Institute (LII): Extensive collection of US constitutional, federal,and state laws.
Magna Carta Plus: British site dedicated to the Magna Carta and other civil liberties documents, and to bringing attention to attacks on and threats to civil liberties.
Constitution Society: An extensive collection of national constitutions, and information on the US constitution and constitutional law. Webmaster has a pronounced right-wing bias, the but it does not effect the entire page.
Useful General Reference Collections
USAF AU General References: An extensive collection of general references from the USAF's Air University.
My Old Collection of Links. No longer maintained, lots of link rot.
Other Useful Links
Issues in Science and Technology
Open Culture - a collection of "(free) cultural & educational media on the web. We feature free online courses, audio books, language lessons, and ebooks. Plus a daily blog with a steady stream of cultural curiosities."
Open Culture's collection of textbooks