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Atomic Rockets is a website established in 1994, originally providing rocketry equations and back-of-the-envelope calculation tools for hard science fiction authors and game designers. It later expanded to cover additional science fiction-related topics including galactic empires and interstellar trade, and offers related merchandise such as nomograms, posters, and branded items. Updates to the site are described as sporadic.
Readybot is a Discord bot that sends updates from feeds and websites to Discord servers, covering RSS and Atom feeds along with YouTube, Reddit, X (Twitter), Bluesky, Twitch, GitHub, Medium, Mastodon and other sources. It supports feed filters, message templating and user and role mentions. Private GitHub repositories are not supported.
RSS Diffbot, branded as RSS Anything, is a tool that transforms any website with a list of links into an RSS or Atom feed. Users enter a target website URL to receive a generated feed URL.
RSS Guard is a multi-function feed reader application. It also operates as a podcast player, basic XMPP client, and Gemini protocol client, and supports RSS, ATOM, JSON, and a range of web-based feed services.
RSSOwl is a free, cross-platform application for reading, organizing, and searching RSS, RDF, and Atom news feeds. It provides capabilities including automated news filtering based on custom conditions, instant search, saved searches, news notifications, bins for storing relevant entries, and keyword labels for feed items. The software is available for Windows, Mac OS X, and Linux, and requires the Java Runtime Environment to operate.
Sage-Like is a fast, lightweight sidebar-based feed reader extension for the Firefox browser. It supports Atom, RSS, JSON and RDF feeds, offers a customizable user interface, and integrates with Firefox bookmarks and sync functionality. It can discover feeds from the sidebar and address bar, including hidden RSS feeds on platforms such as YouTube, Reddit, DeviantArt, Pinterest and Behance, and has a customizable feed tree view.
siftrss is a free web tool that adds filters to Atom or RSS feeds. Users enter a feed URL, select filters, and receive a link to a new filtered feed. Filters can include or exclude items based on title, description or link, using contains, regex or existence matching. The site states no registration, limitations or ads.
TermMax is a fixed-rate borrowing and lending marketplace. It lets users lock in a borrowing rate until maturity, enter leveraged positions at a fixed rate in one transaction, and access curator-managed yield strategies. The project lists planned features including composable yield, atomic orders and smart unwind.
Time.is is a time reference service that provides exact current time for any time zone, synchronized with atomic clock time. It covers 7 million global locations and supports 58 languages, with automatic clock updates when JavaScript is enabled in a user's browser.
Tiny Tiny RSS is a free, open-source, web-based news feed reader and aggregator for RSS, Atom and other feeds. It is self-hosted, supports organizing feeds by folders and subfolders, and offers OPML import/export, a JSON API, plugins and themes.
Tonocracy is guitar tone and effects software from Atomic Amplifiers, offered as a plugin and standalone app. It combines SchemAccurate amp simulation, ToneSnap gear snapshot technology and a suite of effects. Processing runs on cloud GPU servers. The factory amp list includes models such as the Brit 800 and EVan53 Red and Blue.
Tiny Tiny RSS is a free, open-source, web-based news feed reader and aggregator for RSS, Atom and other feeds. This repository is a fork of the original project, created in October 2025 after the original site was retired, and continues development with Docker images published for linux/amd64 and linux/arm64.
The University of Bath Research Data Archive is an EPrints-based repository for finding research data from the university. It offers browsing of archive items and archive protocols, plus OAI 2.0 support and Atom and RSS feeds.
On-demand atomic CSS engine for utility-first styling, presets, and frontend tooling.
Update Scanner is a Firefox addon that monitors web pages for updates, intended for websites that do not provide Atom or RSS feeds. Users can add pages, choose how often changes are checked, and opt to ignore minor updates. Detected changes appear in a notification panel and highlighted in yellow, and updated items are listed in a sidebar.
The VAMDC Portal provides access to atomic and molecular data compiled in a set of databases, offering guided and advanced queries, saved queries and a list of VAMDC databases. It is part of an interoperable e-infrastructure intended to serve the international research community and to give data providers and compilers a dissemination platform.
The X-Ray Database is a reference from the Center for X-Ray Optics at Lawrence Berkeley National Laboratory. It provides access to atomic scattering factor files and lookups of x-ray properties of the elements, plus calculations for index of refraction, attenuation length, transmission, reflectivity and diffraction efficiency. It cites X-ray interaction data covering E=50-30000 eV for Z=1-92.
xkcd is a webcomic described by its site as being about romance, sarcasm, math, and language. The site offers a comic archive, a random comic link, permanent links to individual comics, RSS and Atom feeds, and email alternatives. The comics are licensed under a Creative Commons Attribution-NonCommercial 2.5 License, which permits copying and sharing but not selling.
Zed is a high-performance, multiplayer code editor created by the developers of Atom and Tree-sitter. Built from scratch in Rust to leverage multiple CPU cores and GPU resources, it is designed for speed, real-time collaboration with other users, and AI-assisted editing. The editor is available for macOS, Linux, and Windows.
Zperiod is an interactive periodic table covering 118 elements, with 3D atom models, ions, chemistry tools, and worksheet practice. It is presented as a desktop-only experience with an iPhone variant directing users to open it on a computer. Units include temperature, density, and energy.
