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.
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RadioSide is an internet radio app that looks and works like a classic radio, using a universal radio addressing system created by RadioSide. The site states the radio has transitioned to a /v1 address and asks users to update bookmarks and devices, noting saved stations are preserved.
RadioStationWorld is an informational directory of radio broadcasters worldwide. Its listings cover local radio stations on the web, stations offering streaming webcast services, and local broadcast stations including digital radio throughout North America. The site also features national and regional broadcast networks, shortwave, satellite, hospital, cable and closed circuit or campus radio, radio service providers and industry links. It has operated since February 1996.
Rally the Troops! is a site for playing board games online with other players. Users can invite friends, compete in tournaments, or check the lobby for opponents, who need not be online for asynchronous play. Registration and use are free and there are no ads. A Discord server provides support and help finding opponents.
Random Screenshot helps analyze websites, rankings, screenshots, traffic estimates, or public web statistics.
Screenshot is a screenshot or image reference showing changes, evidence, examples, or notes.
RANDOM.ORG is a service that offers true random numbers derived from atmospheric noise. It provides free tools including a lottery quick pick, coin flipper, dice roller, playing card shuffler and list randomizer. The site also describes a paid Third-Party Draw Service for holding random drawings online. It states the service has existed since 1998 and was built by Prof. Mads Haahr of Trinity College, Dublin.
RandomTools is a website that hosts tools for finding Facebook user, page and group IDs. The page describes entering a Facebook profile, page or group URL and clicking a button to get a numeric identifier. The site also lists additional Facebook, Twitter, Instagram, YouTube, random generator, developer, text and image tools.
Rank Engine helps analyze websites, rankings, screenshots, traffic estimates, or public web statistics.
Ranker helps analyze websites, rankings, screenshots, traffic estimates, or public web statistics.
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.
RansomLook is an open-source intelligence site that tracks ransomware groups, markets and threat actors, displaying posts and activity statistics. It reports 35,915 ransomware posts across 634 groups, 147 markets and 32 actors, alongside leak, ransom note and crypto address counts. An API and torrent intelligence features are listed.
RAR Network Status is a status page listing available RAR Network websites. It lists mirror domains such as nepu.io and nepu.cc with up or down indicators, notes that unlisted Nepu sites are not theirs, and offers a Cloudflare DNS setup guide for connection problems.
Rasterbator is a free browser-based tool that turns any image into a huge multi-page poster. Users pick a size in sheets of paper and receive a print-ready PDF, and nothing is uploaded. The project has existed in some form since 2004, and this dedicated site opened on January 20th 2013.
Rating Graph is an online visualization tool that generates graphs about TV shows and movies based on user ratings. It presents ratings and trends for tens of thousands of TV shows, movies, franchises, directors and writers, with new graphs, daily updates and histories. The site describes itself as a one-man hobby project.
Rave is a watch party service for watching Netflix, YouTube, Amazon Prime, Disney+ and HBO Max with friends in sync, and for texting and talking while watching. It is available for Mac, iPhone, Android and Windows. The site states that Apple removed Rave from the App Store.
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.
Rawkuma is an online platform for reading raw manga, manhwa and manhua. It offers thousands of titles across many genres with daily chapter updates and high-quality scans. Content can be read for free without registration, and a premium option removes ads. The site is designed to work on mobile, tablet and desktop, with bookmark and history features.
Rawkuma is a manga reading site that presents raw manga chapters, listing popular and recently updated series with chapter links. Visitors can read chapters directly and sign in with Google or an email and password.
The Roller Coaster DataBase is an interactive database offering statistics on roller coasters, including the fastest, tallest and longest. The site also lists new additions, videos and reports, with sections such as record holders, world view and inversions.
RCPlanes Online is a site about radio-controlled model aircraft. It offers a basic aerodynamics guide, a beginners' guide and useful information about RC planes. It also provides calculators for center of gravity, wing loading, motor and propeller combinations, propeller static thrust, and plane performance.
RDR2 Map is an interactive map of Red Dead Redemption 2 locations. It helps users find weapons, easter eggs and collectibles, and includes a progress tracker. The site also lists an interactive map for Red Dead Redemption.
Read Aloud is a text-to-speech voice reader available as a Chrome extension that reads aloud the current web-page article with one click and supports 40+ languages. The site also lists browser extensions for Firefox and Edge and a TTS widget service.
Read Scott Alexander is a fan-made archive of writing by Scott Alexander from his Slate Star Codex, Astral Codex Ten and other associated blogs. The site provides searchable, sorted and classified access to the full collection of posts, plus browsing by tags, linked domains and date ranges, and the ability to mark posts as read on a user's device.