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PostSpark is a screenshot editor and beautifier. Users can add backgrounds, browser frames, shadows, text, arrows and blur, then export as PNG, JPG, WebP or copy to clipboard. A URL can be entered to capture a website, or the Chrome or Firefox extension can be used. Free exports are unlimited with no watermark and no account needed.
Pragtical is a free and open source code editor licensed under the MIT license. It runs on Windows, Linux and macOS, and is built on SDL, C and Lua. The editor supports syntax highlighting, multiple cursors and a command palette, with LSP and other features available as plugins, and can be extended via Lua and its C API.
Prash Chan is associated with the MDM – A GEEK'S POINT OF VIEW blog hosted at mdmgeek.com. The blog is run by data management expert Prash Chandramohan and covers topics including master data management, data quality, data governance, cloud, marketing, and leadership. It also offers free email subscriptions for new blog posts.
PressReleased is a paywall bypass tool that provides access to article content. It is inspired by the BypassPaywallsClean browser extension and CycleTLS, and is intended for educational purposes only, with a note to respect content creators and consider subscribing to publications.
Previews is a free browser extension for Twitch, YouTube, and Kick that adds live hover previews to channels in the sidebar, along with link previews in chat. It bundles additional features such as sidebar favorites, auto-refresh on player errors, fast-forward, multi-stream and multi-chat, and a predictions tool. It is maintained since February 2020.
PrintFriendly is a set of online tools for editing, signing, compressing, converting, merging and splitting PDFs, and for removing ads and clutter from web pages before printing or saving them as PDFs. It also offers a browser extension, a WordPress plugin and a REST API that converts a URL or HTML into a clean PDF.
DDoSecrets project for searching and analyzing public-interest datasets and leaked records.
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.
Purpur is open source Minecraft server software based on Paper. It supports plugins designed for Bukkit, Spigot and Paper APIs and focuses on configurability so server owners can customise their server. The PurpurMC organisation also develops PurpurExtras, a plugin for extra features, and PurpurPacks, datapacks adding features to Minecraft worlds.
PyDy, short for Python Dynamics, is a workflow and set of software packages for studying multibody dynamics in Python. Its core is the SymPy mechanics package, which generates symbolic equations of motion for multibody systems, and PyDy extends that output to simulation, analyses, and visualization. It builds on NumPy, SciPy, IPython, matplotlib, Cython, and Theano.
pygal is a Python charting library described as beautiful and simple python charting. Its documentation lists chart types including line, bar, histogram, XY, pie, radar, box, dot, funnel, gauge, pyramid and treemap, and output formats such as SVG, PNG and base 64 data URI.
pyLoad is a free and open source download manager written in Python. It is designed to be lightweight, easily extensible and fully manageable via a web interface. It runs on NAS devices, routers and headless home servers supporting Python, and supports common video sites, one-click hosters and container formats.
qBittorrent is an open-source software project intended as an alternative to µTorrent, based on the Qt toolkit and libtorrent-rasterbar library. It runs on FreeBSD, Linux, macOS, OS/2 and Windows, and is developed by volunteers. Its features include a µTorrent-like interface, no ads, a search engine, RSS support, BitTorrent extensions, remote control through a web interface and bandwidth scheduling.
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.
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.
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.
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.
