SEOnaut is an open source SEO auditing and reporting tool. It crawls websites and checks for broken links, redirects, duplicated or missing meta tags, heading issues, hreflang problems and missing image alt attributes. The tool can be configured to crawl subdomains or sitemaps, follow nofollow links, check external links and access password-protected sites via HTTP Basic Authentication. It can also create WACZ archives of a site.
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Query engine for searching multiple search engines and comparing results from one interface.
SerpBear is an open source search engine position tracking app. It tracks a website's keyword positions in Google and sends email notifications about position changes. It uses third-party scrapers or proxy IPs to scrape Google search results, with Basic, Custom and Smart scrape strategies. A built-in API supports reporting tools, and Google Ads and Search Console integrations are available.
Server Survival is a free, open-source browser game that teaches cloud architecture through 25 campaign levels in 11 languages, without installation. It covers topics such as load balancing, caching, autoscaling, circuit breakers, multi-region failover and GPU inference economics.
SFMLab is an independent site where artists share 3D resources, including models, textures, sceneries and HDRIs, for use in modern 3D tools and Source Filmmaker. Users can upload resource files and download them for free. It is part of the Open3DLab network, alongside Open3DLab and SmutBase.
ShareX is a free and open source screenshot tool for Windows that captures or records any area of the screen and shares it with a single key press. It includes screen capture, screen recording, file sharing and productivity features, and supports uploading to many destinations.
Shell is a free, open source context menu customizer for Windows File Explorer. It lets users choose items for the context menu, create custom commands, and modify or remove existing items. It is a portable utility configured through a plain text file named shell.nss, and it supports Windows 7, 8, 10 and 11 on x86, x64 and arm64.
ShellCheck is an open source static analysis tool that automatically finds bugs in shell scripts. It is written in Haskell, licensed under GPLv3, and can be installed locally via cabal, apt, dnf, pkg or brew. A web page allows pasting a script to view its output.
Shelter is a free and open-source Android app that uses the Work Profile feature to provide an isolated space for installing or cloning apps. Features include installing apps inside a work profile and freezing apps to prevent them running or being woken up when not in use.
Shinobi is an open-source video management system written in Node.js for recording and viewing camera streams. It runs on Linux, Mac and Windows, supports RTSP cameras and offers live stream display in a web browser. The project also provides video recording management, a tiered user system and motion detection.
Shinobi is a video tool for encoding, conversion, repair, playback, editing, or processing workflows.
Shirox is a free, source-available library manager for anime and manga on iPhone, iPad and Mac. It supports community modules, AniList and MyAnimeList tracking, offline downloads, and local video or Jellyfin server files.
Open-source project that provides machine-learning models, research, training resources, or evaluation tools.
Shortkeys is a free and open source browser extension for Chrome and Firefox that lets users customize keyboard shortcuts. It provides over 100 built-in actions covering tab management, scrolling, navigation, zoom, bookmarks, downloads and video controls, along with custom JavaScript actions, shortcut packs, groups, macros, a shortcut recorder and cloud sync.
Shorts Deflector is an open source browser extension that plays YouTube Shorts with the normal desktop interface. It is released under the MIT license and is available from the Chrome Web Store, Firefox Add-ons and GitHub Releases. Builds for Firefox are described as in parity with Chromium.
Shotcut is a free, open source, cross-platform video editor for Windows, Mac and Linux. It supports many audio and video formats through FFmpeg, allows native timeline editing without import, and handles resolutions up to 8K.
Shufflecake is a Free/Libre and open-source Linux tool for creating multiple hidden encrypted volumes on a storage device, scrambled across existing storage space and indistinguishable from random noise when not decrypted. It aims to provide plausible deniability for hidden filesystems. The software is experimental and the project advises against relying on its security for important use.
Shumen.UK is an English-language news site covering Bulgaria for British expats. It describes itself as independent Bulgarian news rewritten in British English, with source attribution and editorial standards. It also links to projects including books, a Bulgarian course, and other websites.
Sigma File Manager is a free, open-source file manager (explorer) app for Windows and Linux. It offers advanced file search, drag and drop, a dual pane view, a built-in file viewer, archiving and compression, and a customizable interface with color schemes and layout options. The project describes itself as quickly evolving.
SignWiki helps explore knowledge, places, timelines, entities, or reference information from open sources.
Silence is an Android app that blocks calls from unknown numbers. Numbers not in the user's contacts are blocked by default, and the app offers optional rules to allow or block callers, including regex patterns, SIM selection on Android 12+, and contacts on Android 10. It is free and open source under GPL-3.
SilentNotes is an open source cross-platform note-taking app for Android and Windows. It uses a WYSIWYG editor with basic formatting, supports to-do lists and tags, and lets selected notes be protected with a password. Notes synchronize end-to-end encrypted between Android and Windows devices, and the app does not collect personal data and runs without ads.
Sileo is a package manager for jailbroken iOS devices running iOS 12 and up, built with Swift and used with APT repositories to install free or paid packages. It is fully open source and comes preinstalled with the Taurine, Odyssey, Odysseyra1n and Chimera jailbreaks, and can be used with checkra1n or unc0ver by adding its repository.
SillyTavern is a locally installed user interface for interacting with text generation LLMs, image generation engines and TTS voice models. It began in February 2023 as a fork of TavernAI 1.2.8 and is built around character cards, collections of prompts that set the behavior of the LLM. It is free and open-sourced.