Sage is a lightweight RSS and Atom feed reader extension for Mozilla Firefox. It reads RSS 2.0, 1.0, 0.9x and Atom feeds, provides customizable newspaper feed rendering via style sheets, includes feed discovery functionality, integrates with Firefox’s bookmark system, supports OPML feed list import and export, offers support for multiple locales, and has a simple one-step install and uninstall process.
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Scholar Key is a Firefox browser extension. It automatically adds shadow library and institutional access links next to DOI links on webpages, and displays Wikipedia citation counts for those DOIs. Users can configure enabled sources, reorder or edit source entries, and add their institution's library access via a maintained libproxy database. Default sources include Anna's Archive Search, Anna's Archive SciDB, and Sci-Hub.
Scrible is a modern research and writing platform for school and work. It allows users to save, manage, annotate, and share web content. Features include cloud storage of bookmarks and files, a searchable library with tags, in-browser annotation, and sharing of annotated articles. A Chrome extension and Google sign-in are available.
Shodan is the world's first search engine for Internet-connected devices. It enables users to discover internet-connected devices from power plants, mobile phones, refrigerators and Minecraft servers, monitor network exposure of devices directly accessible from the Internet, use internet intelligence on how products are changing over time, and use our API and Chrome Extension and Firefox Add-on. The platform crawls the entire Internet every week.
Sigma File Manager is a free, open-source file manager for Windows and Linux. Its features include a smart global search with typo correction, tabs, split view, and an extensions marketplace. It supports LAN file sharing with browser access and FTP, zip archives, and tags, and can replace File Explorer for most everyday actions on Windows.
SimilarSites is a Chrome Extension that enables people to discover similar and related sites. It enables viewing of monthly visitor, has more than 70K people, and is powered by SimilarWeb SimilarTech. It has Site Removal Request.
Sink It is a free browser extension that modifies the web versions of Reddit, YouTube, Twitter/X and Google search. For Reddit it adds comment navigation, adaptive dark mode and double-click upvoting, and removes app banners, buttons and ads. The YouTube and Twitter/X extensions are described as coming soon to the App Store.
Stacks is an AI workspace that combines bookmarks, notes, links and files in one place, described as replacing tools such as Google Drive, bookmarks and Notion. A browser extension allows saving pages with one click, and an AI assistant supports search, summaries and connections across saved content.
Twitch Tools by @CommanderRoot is a collection of tools for Twitch, including emote search and listing, chat badge rankings, follower and following list viewers, blocklist and blocked terms managers, chat ban manager, clip and subscriber list viewers, Plus point stats, VOD and clip backup, and Twitch extension listings. It also offers stats on new Twitch accounts and a report option for bugs or feature requests.
Ulauncher is an application launcher for Linux. It performs fuzzy search that remembers previous picks and auto-selects the best option, and ships with four built-in themes with support for custom color themes. Personalized shortcuts and extensions provide quick access to scripts and searches, and a directory browser opens by typing ~ or /. Package instructions are listed for Ubuntu, Arch, Fedora, OpenSUSE and CentOS 7.
VLSub is a VLC extension for downloading subtitles from opensubtitles.org. Users install vlsub.lua into VLC's extensions directory, then search by hash or by name and download a subtitle file for the playing video. The README notes it does not work on VLC 2.1 and recommends using VLC 2.0 or 2.2.