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puddletag is an audio tag editor primarily created for GNU/Linux, similar to the Windows program Mp3tag. It uses a spreadsheet-like layout so tags can be edited by hand and visible. It supports extracting tag information from filenames, renaming files based on tags with patterns, and basic tag editing. Functions include text replacement, trimming and case conversion, and Actions automate repetitive tasks. Web lookups using Amazon, Discogs, FreeDB and MusicBrainz are supported.

PulseChain — otterscan

otter.pulsechain.com

Block explorer for PulseChain, showing transactions, blocks, addresses, tokens, and network activity.

PulseChain — pulsechain

ipfs.scan.pulsechain.com

Block explorer for PulseChain, showing transactions, blocks, addresses, tokens, and network activity.

Pulsedive

pulsedive.com

Pulsedive is a free threat intelligence platform for searching, scanning and enriching IPs, URLs, domains and other IOCs from OSINT feeds or submitted data. It supports on-demand passive or active scans and a query language for pivoting across indicators and threats, with export options. Paid tiers are listed for non-commercial and commercial use, including API and feed access.

Pundi AIFX Omnilayer — PundiScan Explorer

pundiscan.io

Block explorer for Pundi AIFX Omnilayer, showing transactions, blocks, addresses, tokens, and network activity.

Puppynet — puppyscan

puppyscan.shib.io

Block explorer for Puppynet, showing transactions, blocks, addresses, tokens, and network activity.

python-zpar

github.com

A Python wrapper around the ZPar statistical natural language parser, providing a ctypes-based interface and an XML-RPC ZPar server for batch processing. It works only with English ZPar models and supports 64-bit Linux and OS X. The repository was archived on Sep 13, 2022 and is read-only; the project is no longer under active development.

Qitmeer Network Mainnet — meerscan

qng.qitmeer.io

Block explorer for Qitmeer Network Mainnet, showing transactions, blocks, addresses, tokens, and network activity.

Quai Network Mainnet — Quaiscan

quaiscan.io

Block explorer for Quai Network Mainnet, showing transactions, blocks, addresses, tokens, and network activity.

Quick Copy

github.com

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.

QuickLook

github.com

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.

Quickstart

wireguard.com

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.

RacketBoy

racketboy.com

RacketBoy is an online public forum for gaming hobbyists. It hosts dedicated discussion sections for general gaming, retro gaming, game reviews, gaming setup showcases, gaming culture analysis, and off-topic conversation. The forum also includes a marketplace for buying, selling, and trading gaming-related goods, with post activity tracked across all sections as of October 2026.

Radical Servers

help.riseup.net

Radical Servers is a Riseup page listing server projects described as anti-capitalist, anti-hierarchy, autonomous, feminist or radical, including collectives providing free or mutual aid services to activists and others focused on privacy or decentralisation. The list is organised by region. Riseup states it does not endorse these projects and advises reading their terms of service.

Rally

rally.xyz

Rally is a social wallet application for web3. It lets users follow friends and top traders to see their trading, minting and exploring activity, and it supports trading memes, crypto and NFTs. The app lists trending tokens ranked by traders and volume and offers funding options for deposits and purchases.

RansomLook

ransomlook.io

RansomLook is an open-source intelligence site that tracks ransomware groups, markets and threat actors, displaying posts and activity statistics. It reports 35,915 ransomware posts across 634 groups, 147 markets and 32 actors, alongside leak, ransom note and crypto address counts. An API and torrent intelligence features are listed.

Ransomware.live

ransomware.live

Ransomware.live tracks and monitors ransomware groups' victims and their activity. Created by security researcher Julien Mousqueton, it provides information on ransomware groups, victims, negotiations, and payment demands, and includes a live map showing the latest ransomware attacks.

RansomWhere?

objective-see.org

RansomWhere? is a macOS utility that analyzes file entropy to identify encryption activity and detect untrusted processes creating encrypted files. It suspends suspect processes and alerts the user, who can allow or block them. It runs on macOS 10.15 and later.

Reactive Mainnet — Reactscan

reactscan.net

Block explorer for Reactive Mainnet, showing transactions, blocks, addresses, tokens, and network activity.

Read AI

read.ai

Read AI is an AI meeting notetaker that works across Microsoft Teams, Google Meet, and Zoom. It generates meeting summaries, transcripts, and action items, and offers search across meetings, emails, and messages. It is also available as a Claude Connector, ChatGPT App, and MCP Server.

Reaparr is a Plex downloader that transfers content from accessible Plex servers into a user's own Plex server. It offers multi-threaded, resumable downloads, browsing and filtering of libraries, multi-account management, and Docker-based deployment. It can act as an indexer and download client for Sonarr and Radarr.

receivesmsonline

receivesmsonline.in

Receive SMS Online provides virtual phone numbers in countries including the United States, United Kingdom, Sweden and Canada. Users select a country and a number to view SMS messages received by that number. The site lists amounts and active status for numbers per country.

Recorded Future Insikt Group

recordedfuture.com

Insikt Group is the research unit of Recorded Future. It conducts research on cybercrime, state-sponsored threats and global issues, and supplies analyst-validated data, analytics and cyber and geopolitical intelligence to the Recorded Future Platform. Its resources include intelligence reports, threat briefings and information on threat actors.

Rectangle

rectangleapp.com

Rectangle is a macOS app that moves and resizes windows using keyboard shortcuts or snap areas. It is free and open source, supports macOS 10.15 and later on Intel and Apple Silicon, and can act as a drop-in replacement for Spectacle. A paid Rectangle Pro version adds custom shortcuts for any size and position.