Algodoo is a free physics simulation program that lets users draw and interact with physical systems on a computer, building and exploring by click and drag, tilt and shake, with colors, graphs and forces for visualization. It is available for Windows, Mac and the iPad, and official videos and webinars cover creating educational scenes and other constructions.
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Alison is a free online learning platform that provides free online courses with certificates and diplomas. It has over 6,000 courses across categories including information technology, health, language, business, management, and personal development. The platform has more than 50 million learners and over 15 million graduates from 193 countries. It offers a mobile app for offline learning, business training for organizations, and free tools including English courses, psychometric tests, career guidance, and a resume builder.
All My Books is cataloging software for Windows that builds an electronic catalog of printed books, e-books and audiobooks and tracks books read. It has six views, light and dark themes, and import from Calibre.
Alternatehistory.com is a discussion forum for alternate history scenarios, with sections for divergences before and after 1900. It also hosts finished timelines and scenarios, threads on published alternate history books and media, and user-created flags and maps. A companion wiki lets members add and edit articles, timelines and maps.
Amazon Kindle EPUB Fix is a browser-based tool that attempts to repair EPUB files so they work with Amazon's Send to Kindle service. It fixes UTF-8 encoding problems, hyperlink and table of contents errors, invalid or missing language tags, and stray tags. The book is processed locally in the browser rather than uploaded. The tool comes without warranty and may not produce a valid EPUB file.
Animated Knots by Grog is a site for learning how to tie knots, with animated step-by-step demonstrations. It covers categories including boating, fishing and climbing knots, neckties, and surgical knots, and offers a Knot of the Day and basic knot guidance.
Anime-Planet is a site for discovering anime and manga, tracking progress, and receiving personalized recommendations. It shows popular anime and manga this week, newest recommendations based on titles liked, and current anime listings.
A browser-based viewer for opening ebook and archive files. It supports PDF, EPUB, FB2, MOBI, AZW3, DJVU, CBZ, CBR, RAR and ZIP files, and files can be dropped onto the page or opened by clicking. If a file fails to open, the page suggests trying another application or reporting the problem on the file's page on Anna's Archive.
The Apollo Image Atlas is an online collection of photography from the Apollo-Saturn missions. It includes almost 25,000 lunar images from orbit and from the moon's surface, along with photographs of the earth, astronauts and mission hardware. Images can be browsed by catalog or searched by feature name, coordinate or description.
Apollo in Real Time is a website presenting a real-time interactive journey through the Apollo missions, reliving each moment as it occurred. It consists entirely of historical mission material and offers missions Apollo 11, Apollo 13 and Apollo 17, with launch dates given.
The Project Apollo Archive is described as one of the web's earliest repositories of high-quality images associated with NASA's historic manned lunar landing program. The page states that it requires browser support for frames and JavaScript.
Armaell's Library is a site for downloading and reading light novels, Chinese novels and web fictions. It presents latest updates, most downloaded and most read sections, and uses cookies to remember user preferences.
A minimal web reader for the King James Version of the Bible, organized into the Old and New Testaments. It presents the text without ads, commentaries or notes, and its source code is available on GitHub for viewing or reporting issues.
ARRL is the national association for amateur radio in the United States, connecting radio amateurs with news, information and resources. It covers news and features on emergency communications, technology, contesting and licensing, and publishes magazines including QST.
Art of Memory is an educational platform dedicated to memory improvement. It offers free training resources for mnemonic techniques including memory palaces, peg lists, spaced repetition and advanced mnemonics. Users can train for memory competitions, access guides for academic and everyday memorization, and join a community forum for memory enthusiasts.
Artist Reference is a portal of artist photo reference sites, including human and animal photo references and 3D scans for 3D artists and game developers. The site also links to image collections for comic artists, environment textures and manga tutorials. The company behind it was founded in 2004.
Asianfanfics is a community site for reading and writing fanfiction about K-pop, K-drama, anime, and Asian entertainment. It offers featured stories, latest stories, trending and newly completed sections, recent community activity, and browsing by tag. Reading is free and the site welcomes readers and writers across fandoms.
A Telegram channel that posts a new audiobook in English every day. It also lists contact bots for feedback and advertising, and invites users to view and join the channel in Telegram.
Auto-Brochures hosts PDF car and truck sales brochures, catalogs and electronic media. It covers many vehicle makes, with brochures made for the US or international markets and newer PDFs alongside scanned older printed brochures.
AutoChords is a chord progression generator. Users choose a progression type and key, and the tool shows the main progression with its notes, alternative progressions derived from the circle of fifths, and all standard chords in the key. It includes a randomize option and an edit/export function.
Av8n.com hosts the site of John S. Denker, including See How It Flies, a work on the perceptions, procedures, and principles of flight with 20 chapters and over 200 illustrations. It also offers more than 100 physics-related documents, additional flying-related documents, and notes on vision and image processing.
Awesome Detection Transformer is a GitHub-hosted public collection of research papers focused on transformer-based approaches for computer vision detection and segmentation. The repository organizes papers by research field, and invites community contributions of overlooked papers or resources via issues or pull requests. It also references related toolboxes for transformer-based object detection work.
Boeing 737 Technical is an X account that serves as a stream for The Boeing 737 Technical Site. It shares news, articles, technical information and photos of all models of the Boeing 737.
BackYard Chickens is a community site about raising chickens. It offers tips and tricks for raising chickens, building chicken coops and choosing chicken breeds, and it hosts a forum where members post questions and discuss topics such as feeding, flock management and coop construction. Registration is free.