Tagged “reference”
285 pages · most loved first · page 11 of 12
The Opera Database
A huge free reference to more than 37,000 operas and 4,000 aria PDFs, plus art songs, zarzuelas and plot synopses for si…
The Phrase Finder
A reference site tracing the meanings and origins of thousands of English phrases, sayings, and idioms, researched by Ga…
The Phrenology Page
A long-running reference page on the discredited science of phrenology, with history, terminology in many languages and…
The Preparedness Encyclopedia
A free reference on emergency preparedness and survival, covering planning, supplies, and practical skills for getting t…
The Punctuation Guide
A plain-spoken reference to English punctuation, with clear rules and examples for commas, dashes, quotation marks, hyph…
The Quote Garden
A large compilation of quotations sorted by topic, covering inspirational, humorous, literary, and poetic lines as well…
The Reptile Database
A comprehensive scientific catalogue of every recognized reptile species, with taxonomy, distribution, and synonym infor…
The Skeptic's Dictionary
A reference site of nearly 800 entries examining strange beliefs, cognitive biases, and logical fallacies from a critica…
The Victorian Web
A vast scholarly web of essays and images on the Victorian era, linking social history, science, art, architecture and a…
The Wood Database
An exhaustive reference cataloguing hundreds of wood species with photos, working properties, and identification notes f…
The World Factbook
The CIA's continuously updated reference with authoritative profiles, statistics, maps, and flags for 266 countries and…
Theorem of the Day
A big gallery of famous theorems, each presented as a one-page illustrated poster with a plain statement, a picture and…
Timeline of the Human Condition
A sprawling single-page timeline of milestones in evolution and history, from the origin of life to the present, with sc…
TLDRLegal
A lookup of software licenses summarized and explained in plain English, showing what you can, cannot and must do under…
Two Dimensional Curves
A collection of 939 two-dimensional mathematical curves, searchable by name, equation or shape, each illustrated with it…
Typogui.de
A pocket guide to everyday typography for writers, designers, engineers and students, with clear advice for setting text…
UAVs FYI
An open reference on consumer, commercial and military drones that tracks platforms, suppliers and supply-chain relation…
Unicode Charts
The official reference charts showing every script and symbol block in the Unicode standard, from ancient alphabets to m…
Unicode Table
A browsable, categorized table of every Unicode character and script block, with copy-paste access to symbols from world…
UnitConverters.net
A comprehensive unit conversion suite covering length, weight, temperature, cooking measurements, and dozens of other ca…
Urban Dictionary
A crowdsourced dictionary of slang, internet jargon, and joke definitions that has documented the evolving vocabulary of…
Use The Keyboard
A clean, open source collection of keyboard shortcuts for Mac apps, Windows programs and popular websites, laid out for…
Vexilla Mundi
Pictures and specifications of the flags of the world, including Pantone colors, for vexillology fans and anyone curious…
Visa List
Pick your passport and a destination to see visa requirements for 239 countries, with pages for popular tourist visas an…
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