rachel.worldpossible.org
Use offline educational content through the RACHEL platform.
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radioreference.com
Radio frequency database for public safety, aviation, trunked systems, and scanner information.
radioreference.com
RadioReference is a public reference source for radio and communications data. It provides a database of identified frequencies and trunked radio systems that can be browsed by state, metro area or ZIP code, alongside forums and a wiki. The site reports 226K+ identified frequencies and 7,400+ trunked radio systems. A premium subscription works across RadioReference and Broadcastify.
docs.ragas.io
Ragas is a library for evaluating Large Language Model applications, described as moving from manual checks to systematic evaluation loops. It offers LLM-driven metrics, custom metrics, an experiments-first approach, and built-in dataset management and integration with frameworks such as LangChain and LlamaIndex.
rainbow.me
Rainbow is a mobile and desktop application for trading financial markets, including crypto, stocks, commodities, meme coins and world events. It offers prediction markets, perpetual futures with up to 50x leverage powered by Hyperliquid, and live price data. Users hold their own keys, and every trade earns $RNBW rewards.
fakeinfo.net
Generates random face images for testing, design projects, and sample user profiles.
ranobedb.org
RanobeDB is an open, editable database of Japanese light novels and their official translations, intended for tracking and data purposes. The site states it does not host or provide reading material. It lists popular series, reviews, upcoming and recently released books.
rarlab.com
Rarlab is the home of WinRAR and RAR archivers. WinRAR is an archive manager that can back up data, reduce the size of email attachments, open and unpack RAR, ZIP and other downloaded files, and create new RAR and ZIP archives. A trial version is available for download before purchase.
rate.house
rate.house is a collaborative media database for rating and tracking albums, songs, movies, TV shows, literature, games and podcasts in one place. Users can create and browse lists and tags, and add recommendations. It is described as resembling IMDb or Goodreads with more media types, and as collaborative like Wikipedia.
rawg.io
RAWG is a video game discovery site with a database of games across many platforms, including PC, consoles and mobile. It lets users keep games in one profile and see what friends are playing. Pages list popular and new games, with display based on player counts and release date.
re3data.org
Find research data repositories by subject.
readthistwice.com
Read This Twice collects verified book recommendations from notable people and organizes them into reading lists. The site also offers Sona, an AI-driven book recommendation assistant that searches a book database based on the user's stated preferences.
readwok.com
Readwok is a browser-based reader for online text and books. Users upload files such as epub, fb2 or txt and read them paragraph by paragraph, with modes including single paragraph and autoplay. An inline editor allows merging, adding or deleting text, and data syncs across devices.
docs.google.com
Ready or Not Doc is a public Google document or spreadsheet containing organized links, notes, data, or resources.
rebrickable.com
LEGO database for sets, parts, minifigures, build tracking, and custom model discovery.
recipe-search.typesense.org
Recipe Search is a search interface for browsing recipes from the RecipeNLG recipe database, using Typesense Instant Search. The page states it covers 2 million recipes and suggests example searches such as Pizza, Kale and Curry.
catonmat.net
A cookbook of curl command recipes, created by Browserling, covering common tasks such as making POST and GET requests, adding POST data, constructing query strings, and setting HTTP headers. It also lists arguments for cookies, redirects, authentication, proxies, and saving responses to files.
recollectionwisconsin.org
Recollection Wisconsin is a digital collection that allows users to discover photos, maps, books, artifacts, oral histories and more from dozens of Wisconsin communities. The site is framed around sharing stories and exploring the past.
recon222tttn4ob7ujdhbn3s4gjre7netvzybuvbq2bcqwltkiqinhad.onion.pet
Dark-web style recon search page for finding indexed data and investigation leads.
recordedfuture.com
Insikt Group is the research unit of Recorded Future. It conducts research on cybercrime, state-sponsored threats and global issues, and supplies analyst-validated data, analytics and cyber and geopolitical intelligence to the Recorded Future Platform. Its resources include intelligence reports, threat briefings and information on threat actors.
rebiun.org
Network of academic libraries in Spain.
reddeerpress.com
Red Deer Press is a Canadian publisher specializing in books for children and young adults. Its catalog includes fiction, non-fiction, poetry, history, science, and more across various age groups. The press provides teacher's guides, accepts submissions, and maintains an online store for its titles.
neurocienciaib.org
Nonprofit organization based in Argentina.
redalyc.org
Redalyc is a scientific information system and network of scientific journals. It describes an open access, non-profit model owned by the academy, and lists journals across social sciences, natural and exact sciences, and arts and humanities. Its interface is available in Spanish, English, Portuguese and other languages.