Revisely is an AI-powered learning platform with GCSE and A-Level revision notes, exam questions and past papers, plus tools that generate flashcards, quizzes and summaries from user materials. Generated content can be shared with peers or instructors. It began as a site for UK students preparing for exams and now serves students and professionals.
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The Rolling Deck to Repository (R2R) program provides fleet-wide management of underway data from oceanographic research vessels. It catalogs and submits underway environmental sensor data from research expeditions to long-term public archives, including the NOAA National Centers for Environmental Information. Vessel operators submit cruise data directly. R2R supplies documentation, standard products and tools for documenting shipboard data acquisition, plus post-cruise quality assessment and near-real-time meteorological data assessment.
Rotato offers browser-based video tools for compressing, cropping, and trimming video files, plus social media mockups, text-to-speech voiceover, and image optimization. A video info tool reports file size, codec, resolution, and duration. Some tools, including Rotato Compress Desktop and the transparency converter, are available as macOS or Windows applications.
Rugby24 offers full match replays of rugby coverage, listing leagues such as Super Rugby, NRL, Six Nations and others, plus rugby highlights and video streams online in HD. The site lists full match replays of specific fixtures dated October 2026 across European Champions Cup, Challenge Cup and Rugby League World Cup competitions.
A site with lists of heads of state and heads of government of all countries and territories, generally back to about 1700, plus subdivisions, international organizations and foreign ministers. Birth and death years are given, with asterisks marking uncertain dates.
The Analytical Geomagnetic Data Center of the Trans-Regional INTERMAGNET Segment is operated by the Geophysical Center of the Russian Academy of Sciences. It offers interactive access to magnetic observatory data from Russia and nearby states, plus spaceborne data products. The MAGNUS system provides automated real-time recognition of artificial disturbances and estimation of geomagnetic activity.
SAMOA was an Apache Incubator podling that provided a collection of distributed streaming algorithms for data mining and machine learning tasks such as classification, clustering and regression, plus programming abstractions for developing new algorithms on distributed stream processing engines. Its pluggable architecture allowed it to run on several engines. The podling retired on 2021-03-11.
A guide covering Sandboxie-Plus, software that runs untrusted programs in unprivileged containers. It explains downloading and installing the software, setting up a sandbox, installing an app inside it, and running the sandboxed app or game. The guide notes the software is only available for Windows and that premium features require support to keep permanent access.
Scanner is an all-in-one scanner app built for the Universal Windows Platform. It works with WIA-compatible scanners, saves multiple pages as a PDF or separate images, and includes a built-in editor for cropping, rotating, drawing and highlighting, plus PDF page reordering.
Scholars' Mine is the institutional repository for the Missouri University of Science and Technology, provided as a service of Missouri S&T University Libraries. It offers digital access to scholarly and creative works by the university's faculty, staff, and students, including faculty papers, departmental publications, conference proceedings, and graduate student works, plus campus cultural and historical collections such as yearbooks and the student newspaper.
ScholarWorks@UA is a repository of research and scholarly output deposited by individual university departments and centers on campus. It is a service of the UAlaska System libraries and offers browsing by research unit, center, or department, plus search and author pages. It reports 13,765 papers to date.
SciAlert is an AI-supported international scientific publisher and journal-hosting platform. It hosts more than 50,000 fully open-access peer-reviewed articles, provides publishing services including rigorous peer review, copyediting, and impact tracking, and uses the Creative Commons Attribution license for author copyright retention. It offers resources for authors, editors, referees, librarians, and scholarly societies, plus an indexed research database called the ASCI Database.
A screenshot creator for producing app screenshots for product pages on stores such as the Apple App Store, Google Play Store and Microsoft Store. The page lists size, image, text, background and download controls, plus a 1080 x 1920 size option.
Screenshot Studio is a free, open-source browser editor for screenshots, code images, X post images, and App Store screenshots. It offers background, frame, mockup, and animation options, plus image tools for compressing, converting, and resizing. Images are edited on the device, with no signup, no watermark, and no paid tier.
The Seamount Catalog is a digital archive of bathymetric seamount maps that can be viewed and downloaded in various formats. It holds morphological data, sample information, and related grid and multibeam data files, plus user-contributed files, all downloadable. The catalog currently covers more than 1,800 seamounts from all oceans.
Search All is a multi-search platform that combines multiple AI search engines and chatbots, private web search engines, image and video search, shopping sites and social media networks in one tab. It offers browser extensions for Chrome, Edge and Firefox and an Android app, plus an AI image and video generator.
SeedFinder is a cannabis strain database listing 42,020 varieties from 2,149 known breeders, plus pure local breeds, clone-only strains and unknown or legendary varieties. It connects cannabis cup winners to the database and monitors seedbanks for reliability, service and shipping information.
Sentio is a developer platform for crypto data, offering an indexing SDK, real-time data indexing, custom analytics, dashboards and alerting, plus a single-stepping debugger for transactions. It is presented as an end-to-end observability platform for monitoring, analyzing and diagnosing decentralized applications.
SeoTools for Excel is an Excel add-in for online marketing and SEO work, offering over 100 functions for tasks such as on-page and off-page analysis, plus connectors for services including Google Analytics and Majestic. It also includes a spider that crawls a list of URLs or a root URL.
Shortshare is a utility application for URL shortener services, supporting 14 established services plus custom APIs and self-hosted solutions such as YOURLS. It shortens URLs via a menu bar icon, keyboard shortcut, Safari App Extension, Share Extension or the Windows Share menu, and supports custom URL keywords where the service allows. Link history synchronises across macOS and iOS devices via iCloud. The developer states it is no longer available for iOS and macOS.
Sirah is a platform for reading source-attributed hadith texts from established collections, with Arabic text, translations and source grading. It also offers study guides connecting Quran references and narrations, plus an AI assistant that provides source-linked answers. Readers are advised to check quotations and references against the cited sources.
Sisif renders short AI videos from text prompts. It charges $1 per 5-second clip with no subscription, and the site says credits never expire. Clips carry no watermark, and the service offers portrait video plus a REST API with pay-per-call support for agents.
A personal repository for serving web content and APIs for larger projects and games, also used as a download CDN for large files. It hosts online games including Eaglercraft, Eaglercraft Beta, and Five Nights At Winston's, plus tools such as an Eaglercraft 1.5.2 Crash Viewer and a CSS Sprite Sheet Generator.
[email protected]+ is a gallery of block skins and other content for TETR.IO. It lists over 134 skins from 17 authors, which can be installed using TETR.IO PLUS. The archive is managed by UniQMG and includes submission guidelines and other content such as sound effects.