Education
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data.gov.uk
The United Kingdom's open data portal, providing free access to thousands of government datasets on transport, spending,…
Database of Award-Winning Children's Literature
A searchable database of award-winning children's books that lets you build tailored reading lists by age, award, genre…
Database of Religious History
A searchable scholarly encyclopedia of religious traditions throughout history, with data visualizations built from expe…
DataBasic
A suite of friendly free web tools for data beginners: count words in song lyrics, compare two texts, explore a spreadsh…
DataGenetics
A blog of sharply written essays on puzzles, probability, and game strategy, unpacking things like why lottery number ch…
Dataguessr
A quiz game that asks you to guess real-world statistics, from populations to prices, then reveals the true figure so yo…
Datamath Calculator Museum
An online museum covering every calculator Texas Instruments made or sold since 1972, with photos, teardown details, pro…
DataUSA
An open data platform turning US government statistics on demographics, education, and employment into searchable, inter…
Datawrapper Blog
A blog from the free charting tool Datawrapper, breaking down chart design decisions and sharing interactive examples fr…
date MATH
A dating simulator in which you romance over 25 personified mathematical concepts, from basic algebra to topology, with…
Daughter of Bilitis
A personal reading site with essays, resources and star-rated reviews of books and manga, updated regularly with new fin…
Dave Conservatoire
Free online music lessons built from short video tutorials on theory, rhythm, ear training and instruments, with exercis…
David Rumsey Map Collection
An online collection of more than 100,000 digitized historical maps, atlases, and globes spanning five centuries of cart…
David's Book World
A book blog subtitled adventures in reading, with reviews and thoughts on novels and other books for fellow readers look…
Day Wave
A visualization of the 50 hours a single calendar day lasts on Earth, showing morning, afternoon and evening sweeping ac…
Daydream Puzzles: Logic Grid Puzzles
A free collection of interactive logic grid puzzles ranging from very easy to extreme, each solvable directly in the bro…
Daylight - Follow the Money
An interactive network map of U.S. campaign finance where you pan, zoom and click nodes to see who funds which candidate…
DCHP-3: Dictionary of Canadianisms
A scholarly dictionary of words born in Canada, from regional slang to historical terms, with entry histories, frequency…
dCode
A sprawling free library of hundreds of classical and modern cipher tools, letting curious visitors encode, decode, and…
D-Day Map
An interactive version of the original Operation Neptune wall map from Southwick House, letting you explore the D-Day na…
De Programmatica Ipsum
A magazine about programmers, code and society, written by humans since 2018, with themed issues on file systems, retroc…
De Re Militari
The Society for Medieval Military History's archive of free scholarly articles and primary sources on warfare in the Mid…
Dead Reckon
A geography game where you estimate the distance and bearing between two cities and see how close your sense of the glob…
DeafTec STEM Dictionary
A dictionary of science, technology, engineering, and math terms with sign language videos, making technical vocabulary…
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