National Archives
Search the public U.S. National Archives Catalog for historical records.
Library of Congress
Library of Congress returns searchable digital collections and historic newspaper pages; rights notes may be absent, and newspaper text may contain OCR errors.
Poetry Foundation
Poetry Foundation provides poems, poets, and poetry resources; poem searches follow its search order, while full text is limited to publicly available poems.
Bible Gateway
Bible Gateway provides passage readings up to one chapter, searches returning up to 100 related verses, and a daily verse that may differ by date or translation availability.
BrainyQuote
BrainyQuote returns topic-matched quotes in displayed order, a person’s description and up to 100 quotes with topic tags and links, or the quote shown for the chosen daily category and BrainyQuote’s current day.
Britannica
Britannica returns public encyclopedia articles with introductions, quick facts, headings, update dates and images, plus search results with titles, descriptions, links and images when shown.
Cambridge Dictionary
Cambridge Dictionary provides English definitions, examples, grammar labels, and available UK and US pronunciations, plus translations and paired examples for supported languages, reflecting details shown on its pages.
Class Central
Find online courses across learning platforms.
College Scorecard
College Scorecard returns US college costs and outcomes, including admissions, graduation, debt, and earnings; some figures may be missing, and comparisons cover 2–5 colleges.
Coursera
Coursera offers courses, certificates, projects, and degrees; search results follow Coursera’s order, and publicly displayed prices and availability may vary by location.
Dictionary.com
Dictionary.com provides definitions, pronunciations, audio, examples, and word origins, plus ranked synonyms and antonyms for public Thesaurus.com entries; some word details may be unavailable.
Etymonline
Origins and histories of English words from the Online Etymology Dictionary.
Google Books
Google Books searches books and provides book details, reader ratings, and local ebook prices when available; newest results sort by publication date.
GreatSchools
GreatSchools provides school ratings and profile facts, plus nearby US school search results within five miles; unpublished details may be unavailable, and distances are straight-line estimates.
Merriam-Webster
Merriam-Webster provides definitions, pronunciations, examples, word histories, synonyms, antonyms, and related words for publicly listed entries, plus Word of the Day entries for today or published archive dates.
MIT OpenCourseWare
Free MIT course materials open to everyone.
Open Library
Open Library returns book search results, catalog details, and author works; availability reflects listed editions, not current loan availability, and catalog details may be missing.
Project Gutenberg
Project Gutenberg offers free public-domain ebooks and reading materials, with searchable book details and plain text from the most-downloaded matching edition available.
QS Top Universities
QS Top Universities provides rankings and profiles with latest world ranks, student figures, up to five subject ranks and listed tuition; subject editions may differ.
Quran.com
Quran.com provides Quran reading and search: up to 50 verses with Arabic and translations, optional transliteration, and only the first 50 verses of longer passages.
RhymeZone
RhymeZone finds rhymes, similar-sounding words, and related words, including synonyms, opposites, descriptions, and associations; some results lack relevance scores or syllable and part-of-speech details.
Times Higher Education
Times Higher Education provides yearly World and subject rankings by country, plus universities’ latest displayed ranks, scores, student statistics, and subject rankings; some figures may be missing.
Udemy
Online courses in professional and personal skills.
Urban Dictionary
Urban Dictionary provides crowdsourced slang definitions and examples, plus up to 30 newest Words of the Day with featured dates.