github.com
21st is a GitHub repository or organization with source code, releases, documentation, or project resources.
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21st.dev
A community catalog of user interface resources built by design engineers, including React components, templates, shadcn themes, shaders and gradients. Components are indexed and searchable, can be previewed live, and ship as AI-ready prompts for tools such as Cursor, Claude Code and Lovable. Every component has an author.
epaper.21jingji.com
21st Century Business Herald covers business, economics, companies, finance and markets in People's Republic of China.
hbr.org
The sexiest job of 21st century supports AI-assisted research, knowledge retrieval, summarization, or source analysis.
avalon.law.yale.edu
The Avalon Project is a Yale Law Library initiative that provides public access to digital documents in law, history and diplomacy. Its holdings are organized by historical time period, spanning materials from 4000BCE to the 21st century, and include specialized collections such as the International Military Tribunal for Germany archive and the Project DIANA online human rights archive.
davidrumsey.com
Online historical map collection with over 151,000 maps and related images, including rare 16th through 21st century maps of continents and regions. The searchable database includes the LUNA Viewer and an AI Search Assist. A physical collection is hosted at the David Rumsey Map Center at Stanford University Library.
doshaven.eu
DOS HAVEN is a collection of DOS games from the 21st century, presented as a directory of modern DOS and DOS homebrew titles. The site lists 265 games with genre and release-year filters, and notes that DOSBox allows DOS programs to run on many platforms.
hkbu.edu.hk
Hong Kong Baptist University is a university that describes itself as one of the top liberal arts universities in Asia. Its stated mission is to nurture global citizens for the 21st century through academic excellence and personalised education. The site also links to research, admissions and campus life information.
theyshootpictures.com
They Shoot Pictures, Don't They? is a site dedicated to motion picture film-making, focusing on film directors. It offers director profiles with excerpts and filmographies, plus lists including The 1,000 Greatest Films and the 21st Century's Most Acclaimed Films.
thomwolf.io
A blog post by Thomas Wolf arguing against the idea that AI will produce a compressed 21st century, suggesting current trends would instead yield a country of yes-men on servers. It draws on the author's personal experience as a researcher.