Research data portal for exploring atmospheric records, including observational data.
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A virtual reality space from the National Palace Museum that allows visitors to tour the museum campus and permanent exhibitions anytime, anywhere. Users can observe or listen to in-depth descriptions of selected artifacts and choose featured tour routes.
The Alaska Region Headquarters of the National Weather Service provides regional weather forecasts and warnings. The page links to forecast offices in Anchorage, Fairbanks and Juneau, plus information on sea ice, marine weather, fire weather, aviation forecasts, river forecasts and tsunami information from the National Tsunami Warning Center. It also lists current hazards, observations, radar and climate data.
NesDev.org is a community of homebrew game developers and hardware researchers for the Nintendo Entertainment System and other retro consoles. It provides wikis covering the NES, SNES, WonderSwan and obscure platforms, along with forums and a Discord community. The site also lists resources such as a NES cartridge database and notes that it is not affiliated with Nintendo.
Netlify is a platform for building and shipping web projects. It allows users to create with AI tools or code and deploy instantly to production infrastructure. The platform includes features such as agent runners, deploy previews, AI gateway, functions, database, observability, security, and a global edge network, and operates an official Discord community for builders.
NN Visual is an interactive web-based neural network visualizer. It lets users configure hidden layers, select datasets such as auto_mpg, iris, xor, or mnist, and train a network while observing forward and backpropagation step by step. The tool displays training loss, mean absolute error, weight distributions, and node activation brightness. Written explanations accompany the visualizations to teach concepts like gradient descent, weights, biases, and activation functions without requiring code.
Notesnook is an open-source note-taking app with end-to-end encryption, available as desktop, web and mobile clients. It supports notebooks, tags, favorites, pins, linked notes, an app lock and publishing a single note as a web page behind an optional password. It offers sync across devices and imports from Evernote, Google Keep, Obsidian, Joplin and other apps and formats.
NV:MP is an unofficial community-made multiplayer framework modification for Fallout: New Vegas (2010). The project began in 2015 and is maintained by a group of developers. It uses the X:MP framework for networking technology. It is not affiliated with Bethesda Softworks, Obsidian Entertainment or Microsoft.
Office Holidays lists when countries around the world observe public holidays and bank holidays. Calendars are presented monthly, in a year planner format, or as upcoming lists, with national-level coverage and detailed information on some regional holidays. The stated intention is to help users avoid planning global meetings on days that may exclude colleagues.
An arXiv paper measuring onion website discovery and Tor users' interests with honeypots. The authors deployed honeypot onion websites in March–April 2025 and seeded links via three channels to observe interaction events. They report that human users almost without exception originated from Ahmia.fi, and that the CSAM-themed honeypot drew markedly higher engagement than the others.
OONI, the Open Observatory of Network Interference, is a global community measuring internet censorship. OONI Probe tests the blocking of websites and apps and measures network speed and performance, while OONI Explorer displays censorship data collected from over 200 countries since 2012.
A Leeds City Council page that links to the council's open data resources, including Data Mill North, council data on data.gov.uk, and the Leeds Observatory. It also provides access to terms and licences and the EU reuse of public sector information directive.
OpenMetadata is an open-source AI context layer powered by metadata, semantics, and memory that provides a shared, rich understanding of data for people and AI. It was built by the founders of Apache Hadoop, Apache Atlas, and Uber Databook. The unified platform supports data cataloging, discovery, quality, observability, governance, lineage, and collaboration.
opensourcealternative.to is a free directory that bills itself as the world's largest collection of open source software alternatives to proprietary products. It hosts over 500 open source alternatives to popular proprietary tools, and reports that over 2 million users have replaced proprietary software with options found on the platform. Listed alternatives include game engines, business suites, observability platforms, communication tools, and databases.
Platform and SDK for AI Engineers providing tools for LLM evaluation, observability, and a version-controlled enhanced prompt playground.
PhenoCam is a cooperative continental-scale phenological observatory that uses imagery from networked digital cameras to track vegetation phenology across ecosystems. Its image archive includes over 60 million pictures, and imagery and data are made publicly available in near-real time. The PhenoCam Dataset V3.0 includes almost 5000 site-years of data from 738 sites.
The Phrontistery is a language resource website that has operated since 1996, offering an online dictionary of obscure English words, topical word lists, etymology materials, technical vocabulary aids, lipogram resources, and essays on language and linguistics.
Pl@ntNet is a tool to help identify plants with pictures, organized into regional and thematic floras. Its World flora contains more than 70,000 identifiable species. A newer service identifies plant diseases and pests, with more than 2,000 illustrated entries. Users can explore observations and share their own.
Plugin Updater is an OBS plugin updater and product installer offered on StreamUP's Ko-fi shop. The listing states that the plugin is completely free and asks users to consider leaving a tip to help Andi maintain it.
Pomona College Magazine covers the experiences of the college's alumni, students, faculty and staff. The Fall 2026 issue includes features on the Table Mountain Observatory, the Pomona College Organic Farm, composting research on Lopez Island, campus news and books by Sagehens.
Portkey is a production stack for generative AI builders that offers a suite of tools including an AI gateway, observability features, guardrails and prompt management modules. It is designed to help organizations democratize and productionize generative AI.
PRISM Climate Data is a project of the PRISM Group at Oregon State University that gathers weather observations, applies quality control and mapping methods, and develops spatial datasets showing short- and long-term weather patterns. Datasets cover 1895 to the present and are offered free of charge, with bulk downloads and single grid cell time series.
Private Eye is a UK news and current affairs magazine edited by Ian Hislop and published fortnightly. It combines humour, social and political observation, and investigative journalism, and is available from newsagents.
Project Random is described as a random, obscure content generator for the web that surfaces media with zero views from platforms including YouTube, TikTok, Spotify and others. It lists video, audio and games sources such as YouTube Shorts, Twitch VODs, Soundcloud and Scratch Projects.