convertworld.com...unit convertors
City Distance Calculator...provides both the by air, and by road distance between two cities in both miles and kms, along with a map and driving directions.
timeanddate.com...current time, timezones, date-to-date calculators, and more.
DifferenceBetween.com...Throughout our life we have to make number of choices. To make the right choice we need to know what makes one different from the other.
Encyclopedia of Life...Global access to knowledge about life on Earth
Open Knowledge Foundation...non-profit organisation founded in 2004 and dedicated to promoting open data and open content in all their forms – including government data, publicly funded research and public domain cultural content.
CIA - The World Factbook...provides information on the history, people, government, economy, geography, communications, transportation, military, and transnational issues for 267 world entities.
IPEDS - Integrated Postsecondary Education Data System