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Qtile is a full-featured, hackable tiling window manager written and configured in Python. It defines key bindings, groups, layouts and widgets such as a bar and prompt in its configuration, and supports switching virtual terminals on Wayland.
Quad9 is a free public recursive DNS service operated by the Swiss-based Quad9 Foundation. It replaces a default ISP or enterprise DNS configuration and blocks lookups of malicious host names from a threat list, aiming to protect devices against malware, phishing, spyware and botnets. Service addresses support malware blocking and DNSSEC validation, with optional encryption via HTTPS and TLS.
SSL Server Test is a free online service from Qualys SSL Labs that performs a deep analysis of the configuration of any SSL web server on the public Internet. The site states that submitted information is used only to provide the service.
Quark is a mod for Minecraft Java Edition that adds vanilla-style features. Each feature can be disabled and tweaked individually, and the mod is configured through a q button in the main menu. The project lists features such as inventory sorting, hotbar swapping, auto-walk, chest searching and crafting helper.
Quartz is a static-site generator that transforms Markdown content into websites. It offers Obsidian compatibility, full-text search, graph view, wikilinks, backlinks and LaTeX rendering through configurable plugins. The project requires at least Node v22 and npm v10.9.2, and sites can be deployed to GitHub Pages, Cloudflare, Netlify or Vercel.
QuickChart is a web service that generates chart images on the fly from Chart.js configurations, suitable for embedding in email, SMS, chatbots and other formats. Charts are sent through a URL or POST request and rendered by the Chart.js library. It is dual licensed under the GNU AGPLv3 and a commercial license.
Quickshell is a toolkit for building status bars, widgets, lockscreens and other desktop components using QtQuick, usable alongside a Wayland compositor or window manager. It is configured in QML, loads changes as they are saved, and ships integrations including networking, notifications, system tray and Pipewire modules.
WireGuard's quick start guide explains how to install WireGuard and configure it. It covers the command-line interface, adding interfaces and peers with ip-link, ifconfig and the wg utility, and activating interfaces. It also describes generating base64-encoded keys and NAT and firewall traversal behavior.
RaceVPN is a VPN service offering free premium servers with WireGuard, V2Ray, OpenVPN and other protocols, without registration. It supports Windows, macOS, Linux, Android and iOS, and the free account is valid for a limited period such as three days. Users download a configuration file and import it into a VPN client.
Radix UI provides components, icons and colors for building accessible user interfaces, described as free and open-source. Radix Themes is a pre-styled component library intended to work out of the box with minimal configuration, installed via the @radix-ui/themes package. Unstyled components are offered separately as Radix Primitives.
RetroDECK is a retro gaming platform for Linux, available from Flathub as a Flatpak. Powered by the RetroDECK Framework and ES-DE frontend, it bundles emulators, engines, ports, clients and utilities pre-configured for use.
Rhasspy is an open source, fully offline set of voice assistant services for many human languages. It works with Hermes protocol compatible services, Home Assistant, Hass.io, Node-RED, Jeedom and OpenHAB. Voice commands are specified in a template language and produce JSON events that can trigger actions in home automation software. A web interface allows configuration, programming and testing, with functionality exposed through an HTTP API.
rimgo is an alternative frontend for Imgur. Its documentation also lists Tor instances, which provide improved privacy but require the use of Tor Browser, and i2p instances, which require a browser configured to use i2p.
RiseupVPN is a personal VPN client offered by Riseup for censorship circumvention, location anonymization and traffic encryption. It routes internet traffic through an encrypted connection to riseup.net and, unlike most VPN providers, does not log IP addresses. The client requires no configuration or account registration and is available for GNU/Linux, macOS, Windows and Android. The service is funded entirely through donations.
RoSeal is a browser extension for improving the Roblox website, available for Chrome, Firefox, and Edge. It provides configurable features for Roblox pages, and some features may be disabled by default; beta and experimental features must be toggled on in RoSeal settings.
Searx is a free metasearch engine that aggregates results from over 70 search services. It does not track or profile users by default, does not use cookies unless configured, and supports access over Tor for anonymity. It can be self-hosted, with support for private token-restricted engines, offline local-result engines, and integrations with databases and indexers including MySQL, PostgreSQL, Elasticsearch, Meilisearch, and Solr.
searx.space is a directory of online and offline SearXNG instances. The site lists 70 currently online SearXNG instances, and tracks instance status including offline, connection timed out, HTTP client and server errors. For each listed instance, it displays details such as URL, software version, TLS configuration, security scores, certificate information, IPv6 support, country, associated network, search response times and uptime. Users can submit requests to add or remove instances via GitHub issues, and can filter out networks with known privacy issues.
selfoss is an open-source, web-based RSS reader and multi-source mashup aggregator that collects posts, tweets and feeds into a single place. It is a lightweight PHP application supporting MySQL, PostgreSQL and SQLite databases, with an adaptive mobile layout, OPML import and a plug-in system. Configuration uses a config.ini file or environment variables.
Sendme is an open-source file transfer tool that sends files and folders over the internet without accounts or configuration. It connects devices directly and provides a pastable ticket to share, with resumable fetching and integrity checks.
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.
Server World is a site for people who build network servers with operating systems such as CentOS, Ubuntu, Fedora, Debian and Windows Server. It publishes configuration guides covering Ubuntu installation, NTP and SSH servers, DNS and DHCP servers, and storage servers.
A KOReader settings guide describing a configuration inspired by e-reading enthusiast Stefan Svartling, with additions intended to keep the interface out of the way. It covers document settings, bottom menu settings, general settings, screen and battery tweaks, taps and gestures, advanced reading tools and the status bar, and recommends the Atkinson Hyperlegible Next font.
A guide for setting up the Plutonium launcher on Windows to play Call of Duty: Black Ops I, II and World at War. It covers downloading plutonium.exe, logging in, downloading the base game, and configuring the game folder with the launcher.
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.
