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Reference page describing how MusicBee's album covers view can be extended with hi-res and log badges using highlighting rules. Hi-res badges add hi-res icons; the loggers plugin makes CD rip log scores accessible for log badges.
quanteda is an R package for managing and analyzing text, described as a fast, flexible, and comprehensive framework for quantitative text analysis in R. It provides functionality for corpus management, tokens and n-grams, keywords in context, sparse matrices, content dictionaries, and supervised and unsupervised machine learning.
Quarkdown is an open-source, Markdown-based typesetting system for creating papers, presentations, knowledge bases and static websites. It offers a complete authoring experience with a reactive preview and scripting capabilities, and version 2.4 allows Markdown elements to be extended.
A python framework to transform natural language questions to queries in a database query language.
QuestDB is an open-source time-series database engineered for low latency. It uses a column-oriented, time-partitioned storage engine with memory-mapped files and vectorized execution for high-throughput ingestion and millisecond-level analytical queries. SQL is extended with time-series operators such as SAMPLE BY, LATEST ON, ASOF JOIN, WINDOW JOIN and HORIZON JOIN.
A page from the American Radio Relay League providing amateur radio question pools for download or printing. It lists the Technician, General and Extra class pools with their validity periods, and notes that each pool is normally valid for four years.
Quick Copy is a browser webextension that eases copying text inside browsers. The repository lists Chrome and Firefox as install targets and notes 2000+ active users on Chrome Web Store. It is distributed under GNU GPLv3, with source in the repository and an icon provided by Unicons.
Quick Tabs is an open source browser tool for improving tabs, bookmarks, extensions, or browsing workflows.
QuickLook brings macOS Quick Look-style instant file previews to Windows, activated by pressing Space. It supports over 100 formats including images, videos, documents, code, and archives, and integrates with File Explorer, Open/Save dialogs, and third-party file managers. It is extensible with plugins.
Quicksilver is a free, open-source macOS productivity application that enables users to launch apps, open files, and perform file and system actions via keyboard input. It offers hundreds of plugins to extend functionality, learns user habits to prioritize relevant actions, supports custom keyboard shortcuts and mouse gestures, and provides multiple customizable interface styles. The project is actively maintained by a community of developers.
Quilt is a scientific data management platform hosted on Amazon Web Services (AWS) that helps teams and AI systems locate, verify the trustworthiness of, and reuse data via deeply versioned, context-rich data packages.
Raccoon is an APK downloader for PC that downloads free and paid Android apps directly from the Google Play online store. It can use a proxy to bypass region restrictions, handles Google's Split APK format, and stores APKs locally. The site states that disabling the official Google Play app can extend battery life.
Open source GPU accelerated data science libraries.
RapidTextAI is an AI article generator and auto-publishing platform. A campaign is set up once with topics, AI model, tone and schedule, and RapidTextAI writes and optimizes SEO articles and publishes them on a schedule to WordPress, Medium, LinkedIn and other apps through Zapier. It also offers a REST API, a mobile app, a Chrome extension and a WordPress plugin. Content can be created in over 50 languages.
Rarebit is a free, open-source webcomic template built in HTML and vanilla JavaScript. It uses a single HTML page for all comic pages and offers toggleable navigation, per-page titles and author's notes, and an automatically updating archive. It supports splitting one comic page into multiple image files. The template requires no extensions and little coding experience.
Rasa is an AI agent platform built for product teams developing customer-facing AI agents. The platform extends large language models with structured flows, deterministic logic, and built-in recovery patterns. Its capabilities include real-time enterprise retrieval-augmented generation, voice support, agentic AI functionality, multilingual support, and conversation orchestration, with use cases across customer support, sales enablement, and operational efficiency for industries including finance, retail, and healthcare.
RAWGraphs is a free and open source tool for data visualization. It is a web app that offers almost 30 visual models to visualize quantities, hierarchies and time series. Data inserted is processed only by the web browser, and projects can be saved or exported as vector or raster images.
Raw Accel is a Windows 10 and Windows 11 x86-64 driver that accelerates mouse input in the raw input stream. It began as a replacement for InterAccel and has been extended with more acceleration types, charts and other features. Its releases are signed and run in system space, and it adds a one-second delay when settings change.
Ray Optics Simulation is a web-based tool for creating and simulating 2D geometric optical scenes interactively. It provides components such as single rays, beams, mirrors, glass, ideal lenses, diffraction gratings, detectors and a ruler, with views for rays, extended rays, images and colors. Source code is available on GitHub.
Raycast is an extendable launcher that collects productivity tools in one place. It includes an AI chat agent and extensions for third-party tools such as Notion, Slack, JIRA and Spotify. Its Calculator extension handles math expressions, unit and currency conversions, dates and time zones.
Julia package for loading many of the data sets available in R.
Reader Mode is a distraction-free reader that turns webpages into a simpler reading view with adjustable fonts, text size, spacing, colours and contrast. It includes reading rulers, text-to-speech, a Pomodoro timer, Bionic Reading and a highlighter. Version 2.0 is available as a Chrome extension; version 3.0 is in development.
Reader View is a browser extension that strips clutter such as buttons, ads, and background images from webpages and adjusts text size, contrast, and layout. It uses Mozilla's Readability library and offers a toolbar with a text highlighter, a note-taking widget, and on-the-fly content editing with saving in HTML, Markdown, or screenshot format.
Readwise Reader is a read-it-later app that saves articles, newsletters, RSS feeds, PDFs, EPUBs, YouTube videos and Twitter threads in one place. It offers web highlighting and annotation through a browser extension and integrates with the Readwise app, which resurfaces highlights via Daily Review and exports them to note-taking tools.
