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Published directory entries matching your search.
The Photographic Periodic Table of the Elements is an online periodic table reference site. It includes technical data, along with photographs and descriptions of thousands of samples of the chemical elements. Clicking an element shows more information.
Photonix is a photo management application that ingests a photo collection and builds a searchable image database. It offers an image organizer and viewer, version tracking and de-duplication, multiple users, sharing, and slideshows, and makes the collection accessible from a web browser. Image analysis includes color analysis, location detection, object recognition, and face detection and recognition.
Research index for locating articles, books, authors and citation information.
PhyloPic is an open database of free silhouette images of animals, plants, and other life forms. The silhouettes are available for reuse under Creative Commons licenses and can be downloaded for educational materials, research articles, and other projects. The site also offers API access and accepts uploaded silhouettes.
Pi-hole is a network-wide ad blocker installed in one place so every device on a network is protected. It runs in Docker or on a supported Linux distribution and is used as a DNS server, with a web interface, built-in DHCP server, group management and allow/deny domain rules. Pairing it with a VPN extends protection on mobile data and public Wi-Fi.
Pianos.pub is a community map that catalogs street and public pianos worldwide. It lists exact locations, photos, sightings and availability reports, and combines public datasets, historic social posts, personal knowledge and user contributions. Every piano keeps a history of sightings, comments and availability reports, and users can submit missing instruments.
PicView is a picture viewer for Windows 10/11 and macOS that supports various image formats, including animated WEBP and GIF, SVG, AVIF, HEIC, PSD and comic book archives. It offers EXIF data display, image compression, batch resizing, image effects and galleries. Portable and installable versions are available.
PiGallery2 is a self-hosted directory-first photo gallery website optimized for low-resource servers, especially Raspberry Pi. It offers a photo viewer with an information panel, maps using photo location data, and advanced searching with boolean logic, negation, exact and wildcard matching. Installation is possible via Docker or native setup.
pigz is a parallel implementation of gzip for multi-processor, multi-core machines. It is a fully functional replacement for gzip that exploits multiple processors and cores when compressing data. It was written by Mark Adler and uses the zlib and pthread libraries.
Pingo is an experimental lossless and lossy image optimizer for PNG, JPEG, WebP and APNG files, designed to transform image data for the Web. It runs from the command line with optimization levels and quality settings. Its license permits free use for exclusive private usage only, and does not permit repackaging, redistributing, downloading, reselling or reusing it through other services, even for non-commercial purposes.
Search an online collection of books, documents, media and archival records.
Pirsch Analytics is a privacy-friendly, open-source web analytics tool presented as an alternative to Google Analytics. It is cookie-free, integrates via a tracking script, plugins, or API, and omits consent banners. The tool offers dashboards with filters, session analysis, custom event and conversion goal tracking, and imports data from Plausible, Fathom, and Google Analytics.
The Pittsburgh Queer History Project (PQHP) is an oral history and media initiative founded in 2012 that focuses on LGBTQ after-hours nightlife in Pittsburgh, Pennsylvania between 1960 and 1990. Its core program is Miss 89 (MS89), a series of in-person intergenerational media archive events featuring rare film screenings and other activities to support collective, cross-generational memory sharing. The project also hosts public events.
A browser-based tool for interactively creating and editing tables and exporting them to plain text. It supports ASCII and Unicode characters, configurable horizontal and vertical headers, and selectable border styles. The script runs entirely in the browser, and entered data is not saved to a server.
Database of public social media posts by law-enforcement officers reviewed for accountability research.
The Plains to Peaks Collective is a collaborative initiative for libraries, archives, historical societies and museums in Colorado and Wyoming to share their digital cultural collections with a broader public audience. It provides resources for participants including a digitization toolkit, DPLA search widget, and guidance on digital stewardship, copyright, metadata management, and participation in shared digital projects.
A database listing aviation accidents from 1908 through the present, browsable by category, airline and operator, with sections for accident photos, statistics, famous deaths, last words and an accident map. Each entry records date, location, operator, aircraft type, registration, occupants and fatalities.
Planespotters.net is a civil aviation database with 1 million photos and information on 50,000 aircraft. It provides information on registrations, airframes and airlines, along with aviation photos, latest deliveries and photo news.
PlayCo-opGame is a database of co-op and multiplayer games. It lists titles by player count and mode, including split-screen, LAN and online support, and provides tutorials on multiplayer mods and downloading.
Playing Soviet is an interactive database of Soviet children's book illustrations drawn from the Cotsen Collection at Princeton's Firestone Library. The illustrations are selected and annotated by scholars and students of Russian and Soviet culture. The site says its data visualizations are still under construction and that its image database will grow by roughly 100 images a year.
PlayTracker is an app that connects to gaming platforms and combines their data, including games, achievements and stats. It offers cross-platform profiles, social feeds, challenges and estimates. A web version is available, with an ad-supported Windows desktop app and mobile apps listed as coming soon. Paid Indie and Pro subscription tiers exist for professionals.
Pleco is a Chinese language reference and learning app for iPhone, iPad, and Android. It offers OCR lookup, handwriting lookup, licensed dictionary databases, audio recordings, flashcards, a document reader, a screen reader for Android, and animated stroke order diagrams.
Digital library at the University of Patras.
PlowTO is a City of Toronto map service. According to the city page, the map is unavailable during the summer months while routine maintenance is completed, and the service resumes in the winter season when snow-clearing operations begin.
