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plugdata is a free, open-source visual audio programming environment and a modern fork of Pure Data. It offers VST3, AU, CLAP and LV2 plugin export, includes the ELSE and Cyclone libraries, and supports Daisy hardware and code export. It runs as a standalone app, a DAW plugin, or on embedded hardware.
PNGHut is a database of free to download transparent PNG images, with user-created and uploaded content. Uploading is available to members after an account period; images are available for personal and editorial use, with a premium account required for commercial rights.
PocketBase is an open-source backend tool distributed as a single file. It includes a realtime database, user authentication, file storage, and an admin dashboard. It can be used as a standalone application or extended via Go and JavaScript hooks, and integrates with common frontend development stacks.
Podstatus is a site for browsing Apple Podcasts and Spotify podcast charts by country and category. It refreshes Apple chart data throughout the day, and Spotify publishes its podcast charts daily. The site describes a chart as a snapshot rather than a lifetime league table.
PokéAPI is an open RESTful API for Pokémon data, described as free and open to use. It offers a consumption-only interface where only the HTTP GET method is available on resources, and no authentication is required to access it.
Polaris is a web-based integrated library system developed by III for public libraries. It supports library staff workflows, administrative functions, and patron services. The system is built for consortium-scale operation and can function across varied library environments, with features to connect to other library systems and associated services.
Caspio database for searching police decertification records and related public reports.
Map and dataset of police surveillance technologies and locations in Chicago.
Database for searching police brutality incidents, videos, reports, and accountability records.
Digital library for searching books, documents, images and online collections.
Browse digitized texts, images, archives and cataloged cultural materials.
Find digitized publications and collection items through an online library.
The Earth Magic Portal Generator is a web application that enables users to navigate between videos of global locations. It offers two control modes: hand tracking, which is recommended, uses the device camera to track hand movements with all data processed locally in the browser, and mouse control. Users open a portal by moving their hand or mouse over a central circle, change videos via clockwise circular motion, enter fullscreen by holding the gesture or clicking the portal, and access previous videos with counterclockwise motion. The app includes settings for control mode, hand and camera previews, and accepts donations to support development.
Italian national online portal for genealogical and civil status records held in state archives, managed by Direzione Generale Archivi.
Portfolio Performance is an open source tool for calculating the overall performance of an investment portfolio across all accounts, using True-Time Weighted Return or Internal Rate of Return. It records the full history of transactions and loads historical prices from various sources. Data is stored in XML and can be exported as CSV or JSON.
ArcGIS dashboard mapping power plants across the United States with energy and location data.
Powerdrill Bloom is an AI data analysis workspace with memory. It lets users ask questions across documents and databases in plain language, returning results with the page, row and figure behind them. It runs on-premise or in a private cloud. The free plan includes 1,000 daily refreshed credits and one scheduled task.
Press articles about Heinrich Heine in German and international press.
Find digitized publications and collection items through an online library.
Search an online collection of books, documents, media and archival records.
PressPulse AI is an AI agent built for HARO monitoring. It sends relevant media opportunities from across the internet and supports reviewing and responding to them. The tool matches requests to a professional background and offers AI pitch drafting, domain authority data, first-mover notifications, favorites and blocklists, and integration with platforms including Twitter, LinkedIn and Substack.
Catalog of Princeton University Library.
PRISM Break is a site that encourages opting out of global data surveillance programs such as PRISM, XKeyscore and Tempora by encrypting communications and ending reliance on proprietary services. It lists recommended projects by platform, including mobile, computer and network categories. The site states that using the recommended projects will not guarantee that all communications are shielded against surveillance states.
Pritunl is a free open source enterprise distributed VPN server supporting OpenVPN, WireGuard and IPsec. It virtualizes private networks across datacenters and provides remote access through a web interface. Servers are distributed across multiple instances with automated failover, and the project is built on MongoDB. A Python plugin system allows custom authentication and access control.
