Birdland is a collaborative filtering recommendation library written in Go. It performs a random walk on a biased user-items bipartite graph to generate user-item pairs, which the recommender processes into recommended items. The project includes sampler and explorer components such as Bird, Emu and Weaver.
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Chartopia is a web-based tool for discovering, creating and managing random tables and generators for role-playing games. The documentation describes it as part chart discovery tool, part creation tool and part game preparation tool, usable on mobile devices. Users can roll on a collection of tables without sifting through books.
ChefBoost is a lightweight decision tree framework for Python. It supports standard algorithms including ID3, C4.5, CART, CHAID and regression trees, as well as advanced techniques such as gradient boosting, random forest and Adaboost, with support for categorical features.
City Guesser is a browser game that places the player in a random location and asks them to guess where they are. It offers worldwide and regional maps, including the USA, Europe, Canada, Russia, the United Kingdom, France, Asia, Japan, India, Brazil, Australia, Argentina and monuments. It also includes Country Streak and Radius Streak modes and No Moving and Time Limit challenges.
Color Designer is a web tool collection for visual color work. The tools list includes a Palette Generator, Gradient Generator, and Color Name Finder, along with a Color Palette Builder, Color Mixer, Color Wheel, Color Converter, Image Color Picker, Random Color Generator, and Color Contrast Checker.
CRF++ is an open source implementation of Conditional Random Fields for segmenting and labeling sequential data. It is designed for general purposes and can be applied to NLP tasks such as named entity recognition, information extraction and text chunking. Feature sets can be redefined, and it is written in C++ with STL.
CrystalDiskMark is a disk benchmark tool for Windows. It measures sequential and random read, write, and mixed performance, with several measure modes. It runs on Windows XP through 11 and Windows Server editions on x86, x64, and ARM64 architectures. The documentation notes that benchmarks may shorten SSD or USB memory life and that results are not compatible between major versions.
cs.email is a disposable temporary email service. It requires no registration: visitors receive a random address and may also choose their own. Received emails stay in the inbox for one hour. The site is also available as a Tor hidden service. A Scrambled Address feature adds protection for inboxes.
CSS Tip is a website that publishes daily CSS tips and tricks for web developers. It aims to help users keep up to date with new and modern CSS features. The site includes an archive of over 300 tips and a random tip feature.
DeArrow is an open source browser extension that replaces titles and thumbnails on YouTube with community created versions. Titles can be any text, and thumbnails are screenshots from specific timestamps, submitted and voted on by users. When no submissions exist, the extension can format the original title and set a screenshot from a random timestamp as the thumbnail.
DiceSimulator.com provides a dice simulator for traditional six-sided dice, letting users choose one to six dice and roll them. The site also includes pages on the history of dice and on popular dice games. It explains that dice are used in gambling and fun games to add a random element.
donjon is a collection of random generators for Dungeons & Dragons and other tabletop role-playing games. Generators cover fantasy names, world maps, weather, quests, NPCs, loot, castles, towns, calendars, dungeons, inns and treasure maps, with sections for AD&D, d20/Fantasy, Microlite20, Pathfinder and D&D 4e. It also includes an initiative tracker and calculators.
Dark Ride Database is a site collecting information about dark rides, with sections for rides, parks, companies, news and specials. It includes a world map, search, random rides and news items about attractions and manufacturers.
English Phrasal Verbs is an application for learning phrasal verbs. It selects a random phrasal verb, displays its definition, and expects the user to pass checks. If a check is failed, the user returns to the previous check next time. Completed verbs are removed from the list and a new verb is suggested.
Creates random company names for startups, stories, and design mockups.
Offers a collection of fictional data generators for testing, examples, and creative projects.
FakeMail is a temporary email service that provides disposable email addresses to keep the user's original mailbox safe. It offers a randomly generated password and message retention options from 10 minutes up to 2 weeks. The service is free to use and accessible from desktop or mobile devices.
Free Speculative Fiction Online provides links to science fiction and fantasy stories that are available for free online. The site states that it does not link to pirated science fiction and excludes sites that make stories accessible without the author's or publisher's explicit agreement. It includes sections for new additions, authors, favorites, search and a random story, plus Hugo and Nebula award nominee lists.
Galaxy of Games is a page collecting links to PC ports, decompilations, remakes, demakes, fan games, total conversion mods and texture packs. It is inspired by the old shareware collection of the same name and Zophar's Domain. The author adds links every couple of days. The page also offers collections for fighting games, beat-em-ups, randomizers, multiplayer games, Mega Man and Sonic the Hedgehog.
Genetic Cars 2 is an HTML5 web simulation that uses a simple genetic algorithm to evolve random two-wheeled shapes into functional cars over successive generations. It uses the box2d physics engine, includes configurable simulation parameters such as mutation rate and gravity settings, and offers a separate LEGO brick-themed variant. Users can save and restore population data and view replays of top-performing cars.
A Chinese segment based on Conditional Random Field.
GeoGrid is a daily trivia game built around a 3×3 grid in which rows and columns each represent a geography category and players name a place fitting both. World mode uses countries and States mode uses U.S. states. Confirmed answers are scored by popularity, with lower scores better, and an Unlimited mode offers randomly generated grids.
Geometrize is a desktop application and open source toolkit that recreates images as abstract arrangements of rectangles, triangles and ellipses. It generates thousands of random shapes and repeatedly mutates them using hillclimbing optimization, keeping only the best-fitting ones. It is available for Windows, Mac and Linux.
A free SVG wave generator for web design. Users choose a curve, adjust complexity, and randomize the result. The site notes it is now part of Haikei.app, and a Figma plugin is available for making waves directly in Figma.