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Published directory entries matching your search.
Red Blob Games publishes interactive visual explanations of math and algorithms, using examples from computer games and other projects. Topics include pathfinding, map generation from noise, hexagonal grids, Voronoi diagrams, graph theory and 2D visibility. Articles are free, with no signup and no ads, aimed mainly at independent, student and hobbyist software developers. The site also hosts demos such as map generators.
Refdesk is an online reference directory that aggregates links to a variety of general reference and research resources. The site hosts links to encyclopedic works, fact-checking tools, quick reference materials, and newspaper listings. It is designed to serve students, teachers, researchers, and the general public.
Refold provides educational videos, lessons, tutorials, or self-learning resources.
Refold Mandarin provides educational videos, lessons, tutorials, or self-learning resources.
RefSeek is an academic search engine intended for students and researchers. It retrieves relevant academic results from web pages, books, encyclopedias, and journals, supports searching for PDF and Microsoft Office documents, and includes calculation and unit conversion features.
RemNote is an AI-powered study tool for students. It lets users upload PDFs, videos, or notes to instantly generate AI flashcards, quizzes, summaries, and explanations, and includes note-taking, spaced repetition, an exam scheduler, PDF annotation, and an AI tutor.
Explore connections between research papers and authors.
Resources provides educational videos, lessons, tutorials, or self-learning resources.
Resources provides educational videos, lessons, tutorials, or self-learning resources.
A site offering lessons on the fundamentals of reverse engineering, binary analysis and software security. It describes hands-on tutorials, practical examples and real-world scenarios covering binary analysis, malware research, and static and dynamic analysis.
Reversepedia is a Wikipedia browsing tool that does not host original content, only reversed hyperlinks between English Wikipedia articles. It enables users to identify which Wikipedia articles link to a specified article, and includes a random article search function.
Reverso provides educational videos, lessons, tutorials, or self-learning resources.
Revisely is an AI-powered learning platform with GCSE and A-Level revision notes, exam questions and past papers, plus tools that generate flashcards, quizzes and summaries from user materials. Generated content can be shared with peers or instructors. It began as a site for UK students preparing for exams and now serves students and professionals.
revisiondojo provides educational videos, lessons, tutorials, or self-learning resources.
RevisionScience provides educational videos, lessons, tutorials, or self-learning resources.
RhinoSpike is a language learning tool that connects users with native speakers to exchange foreign language audio files. Users submit text to be read aloud, record audio for other users' requests, and download the resulting recordings.
Rhodes University is a higher academic institute in South Africa that offers a range of courses and diplomas. The site links admissions for undergraduate, postgraduate and international students, along with faculties and departments in commerce, education, humanities, law, pharmacy and science.
rip.so is a memorial site listing messengers, social networks, browsers, gadgets and websites the internet forgot, organized into categories such as messengers and chat, social networks, software and apps, streaming and video, and search engines and browsers. The page is marked as under construction.
A community-driven collection of roadmaps, articles and guides intended to help developers grow in their careers. It offers role-based and skill-based roadmaps, best practices and guides, covering topics such as frontend, backend, full stack, DevOps, data analysis and machine learning, and allows searching available roadmaps.
A project for an amateur-built liquid fueled rocket engine and flight vehicle, with a site covering engine designs, igniters, a rocket, test stand and software. A launch of Rocket 1 reached 10,800 ft after about 10.5 seconds of engine run time.
Rochester ASL / LSF provides educational videos, lessons, tutorials, or self-learning resources.
RocketLaunch.org lists rocket launches scheduled for the day, including launches from SpaceX, NASA and other agencies. It provides live updates, videos, mission details and a live countdown, and offers pages for past launches, scheduled launches, launch sites and launch providers.
Royal Constellations is a visualization exploring a thousand years of ancestral connections in the European royal families. Clicking stars selects people and shows the shortest path between two royals. Each star is a person placed by year of birth and proximity to a royal leader today.
A web-based Vim cheat sheet listing commands and shortcuts grouped by area such as global commands, cursor movement, insert mode, editing, visual mode, registers, marks, macros and other topics. It presents concise commands intended for both beginners and experienced developers using Vim.
