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Random Song Generator is a website that generates random songs from Spotify music to help music enthusiasts discover new songs and artists. Users enter a number from 1 to 10 and generate tracks per run, with unlimited generations; an invalid or blank number defaults to 6 results. A YouTube version is also referenced.
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.
ranger is a console file manager with VI key bindings. It provides a minimalistic curses interface with a view on the directory hierarchy and ships with rifle, a file launcher that automatically finds the program to use for a file type. It requires Python and a pager like less to run.
RankingRider provides machine-learning models, research, training resources, or evaluation tools.
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.
Ransomware.live tracks and monitors ransomware groups' victims and their activity. Created by security researcher Julien Mousqueton, it provides information on ransomware groups, victims, negotiations, and payment demands, and includes a live map showing the latest ransomware attacks.
RapidRAW is a non-destructive, GPU-accelerated RAW image editor for Windows, macOS, and Linux. The editor and its built-in local AI tools are free; an optional RapidRAW Cloud subscription provides remote GPU generative edits.
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.
RareFilmm, subtitled The Cave of Forgotten Films, is a blog that posts about rare films and television programs. Its posts describe individual titles, such as documentaries, comedies and horror films, with plot summaries and links to watch them.
Rarible is an NFT marketplace or protocol for buying, selling, minting, or trading digital collectibles.
Rasa is an AI agent platform built for product teams developing customer-facing AI agents. The platform extends large language models with structured flows, deterministic logic, and built-in recovery patterns. Its capabilities include real-time enterprise retrieval-augmented generation, voice support, agentic AI functionality, multilingual support, and conversation orchestration, with use cases across customer support, sales enablement, and operational efficiency for industries including finance, retail, and healthcare.
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.
RateMyDorm is an education platform focused on college dorm information. It hosts authentic student reviews of over 2,000 North American dorms, provides dorm photos, forum discussions, and allows users to submit anonymous dorm reviews.
RateMyProfessor provides educational videos, lessons, tutorials, or self-learning resources.
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.
RAWGraphs is a free and open source tool for data visualization. It is a web app that offers almost 30 visual models to visualize quantities, hierarchies and time series. Data inserted is processed only by the web browser, and projects can be saved or exported as vector or raster images.
Raw.pics.io is an in-browser viewer and converter for RAW image formats including CR2, NEF, ARW, ORF, PEF, RAF and DNG. It converts and edits RAW, PDF and JPG files into JPEG, PNG and other formats, with resizing, compression and pixel size changes available. All processing happens in the browser, and the service is free for the first five conversions without registration.
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.
Ray Optics Simulation is a web-based tool for creating and simulating 2D geometric optical scenes interactively. It provides components such as single rays, beams, mirrors, glass, ideal lenses, diffraction gratings, detectors and a ruler, with views for rays, extended rays, images and colors. Source code is available on GitHub.
Raycast is an extendable launcher that collects productivity tools in one place. It includes an AI chat agent and extensions for third-party tools such as Notion, Slack, JIRA and Spotify. Its Calculator extension handles math expressions, unit and currency conversions, dates and time zones.
Rclone is a command-line program for managing files on cloud storage, described as an alternative to cloud vendors' web storage interfaces. It syncs directories between storage systems and supports over 70 cloud storage products, including S3 object stores and standard transfer protocols. It can mount local, cloud or virtual filesystems as a disk and is open-source software written in Go.
The Research Data Center at ZPID is a platform for publishing and reusing psychological research data across fields of psychology. It offers support for documenting research data, assistance archiving data in PsychArchives, and provision of datasets and analysis structures such as PsychOpen CAMA for reuse.
