StepByStepML provides free online machine learning calculators that solve algorithms step-by-step for computer science exams. Users input a dataset and the site shows the full manual calculation for algorithms including K-Means, Minimax, KNN, A* Search, and evaluation metrics. Theory guides accompany the interactive solvers, and the site states it is built for CS students.
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Sysinternals is a collection of advanced system utilities and technical information created in 1996 by Mark Russinovich. The utilities are intended for IT Pros and developers to manage, troubleshoot and diagnose Windows and Linux systems and applications. Sysinternals Live is a service that enables running the tools directly from the Web without manually downloading them.
Tangram Heightmapper is an elevation data browser that auto-exposes the display so the highest and lowest visible elevations are white and black, producing a grayscale heightmap. The image can be exported and imported as a displacement map in 3D applications. Auto-expose can be unchecked to set minimum and maximum height levels manually.
The Old Computer is a retro gaming and computing resource offering ROMs and emulators for old computers, consoles, arcade machines, pinball tables and mobile devices. It also provides box art, game music, manuals and magazines, along with a user forum and community. The site says its contents and pages are provided free of charge, with donations supporting hosting and bandwidth costs.
The Retro Web is a hardware database covering motherboards, expansion cards, chips and CPUs, chipsets, drives and related components. It offers board photos, BIOS images, manuals, drivers and software, with quick search and browsing by category. Listings include counts such as motherboards, BIOS images, manufacturers and chip families.
The Yeast Metabolome Database (YMDB) is a manually curated database of small molecule metabolites found in or produced by Saccharomyces cerevisiae (also known as Baker's yeast and Brewer's yeast). It covers metabolites described in textbooks, scientific journals, metabolic reconstructions and other electronic databases, and includes metabolites arising from normal S. cerevisiae metabolism under defined laboratory conditions as well as metabolites generated by S. cerevisiae when used in other contexts.
theindex.fyi is a maintained, manually curated meta-index of indie web and small web index sites. It organizes directories into categories such as curated directories, RSS and feed aggregators, search engines, random discovery, constraint-based clubs, and IndieWeb infrastructure. The project was born from a Hacker News comment thread and checks entries periodically for status.
Themes is the official repository for custom visual themes for the Rockbox open-source media player firmware. The site hosts downloadable themes for a wide range of supported Rockbox-compatible devices, allows users to upload their own custom themes following published guidelines, and notes that some themes require the optional Rockbox font pack to function correctly. Themes can be installed via the Rockbox Utility tool or downloaded manually.
TinyGem is a bookmarking service that uses saved links to surface related content from manually curated sources. It shows discussions on Hacker News, Reddit and Twitter for saved links, offers personalized recommendations, generates article summaries, and allows export of links as a bookmark file. An API to create new links is listed as a feature.
Trail Router is a running route planner. Its routing algorithm prefers paths through parks, forests or by water and avoids busy roads where possible. It can automatically plot a round-trip route of a desired distance or support manually created point-to-point routes, with preferences for nature, lit streets or fewer hills. Android and iPhone apps are available.
TTS WebUI is a free Gradio-based web interface for text-to-speech, audio and music generation. It can generate audio from text using over 30 AI models, including Bark, MusicGen, Tortoise and Vocos, and offers voices from the Bark Speaker Directory. Installation is available through one-click installers or manual setup.
mantra.py is a Python rewrite of mantra that views online manual pages, taken from man.archlinux.org, from the terminal without downloading and installing the whole package. It requires Python, BeautifulSoup4 and fzf, and is installed manually via git clone and make install or through the AUR. Command-line options include help, keyword and download.
UBGHub is a community-driven directory for discovering and sharing unblocked games and sites. It lists unblocked games sites and proxies for use at school, with sites manually verified for safety and quality. Users can submit their favorite unblocked sites to share with others. The directory states it is regularly updated with new unblocked games and proxies.
UniProtKB/Swiss-Prot is the manually annotated and reviewed section of the UniProt Knowledgebase. It is a non-redundant protein sequence database that brings together experimental results, computed features and scientific conclusions. Since 2002 it has been maintained by the UniProt consortium and is accessible via the UniProt website.
Universal Installer is an Android app for installing and managing APK packages on phones, Android TV and Wear OS. It supports split APK bundles and manual splits, extracts OBB game data, and offers silent install via Shizuku, root or the system installer. It also provides VirusTotal hash lookups before install, local sharing to TVs, and an app manager.
Unwatermark is an online tool that removes watermarks, logos, text and unwanted objects from photos and videos using AI. It offers automatic detection, a manual brush and video cleaning. It supports formats such as JPG, PNG, WEBP, MP4, M4V and MOV, and no login is required for the removal feature.
Vimm's Lair is a site dedicated to console videogame nostalgia, offering thousands of games, full-color manual scans, user ratings and reviews, console emulators, and ROM hacking content. It states that it has been preserving classic videogames from consoles past since 1997.
Volume² is an advanced Windows volume control program. The GitHub repository contains only part of the program that is open source, namely languages and OSD, tray and meter skins. It is listed as supporting Windows XP through Windows 11 and can be installed from the Microsoft Store, Steam, Chocolatey or manually.
wallpapper is a console application for macOS that creates the dynamic wallpapers introduced in macOS Mojave. It builds wallpapers from a folder of images and a JSON description file, and supports solar-based dynamic wallpapers. The tool is written in Swift and can be installed via Homebrew or built manually.
Waltheri's go pattern search is a web application for searching go positions such as joseki and fuseki in a database of professional game records. Users create a position on a board and can find occurrences in pro games along with continuations played. It offers fuseki, joseki and manual search modes.
WebscrapeAI is a no-code web data collection tool that automates gathering information from websites without requiring manual scraping or programming skills. It provides customizable, accurate, and fast data collection, with free trial access and paid monthly pricing plans available.
The WHOI Argo Program page is a resource for information about Argo floats deployed by the Woods Hole Oceanographic Institution. It links to status pages for core and deep floats, BGC floats, and ALAMO/ALTO floats, plus real-time data flow and DMQC status. It also offers deployment plans, manuals, coverage maps, and KML files of float locations.
The Rockbox Wiki is a collaborative tool for storing documentation, FAQs, how-tos, proposals, and other static information for the Rockbox project. Contributors register and request write permission, and all changes are version controlled and tagged with the author's name. It also indexes the Rockbox Manual and port status pages.
Wiki is a Linux or Unix documentation project with guides, references, or manuals.