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Nmap is a free open source security scanner and network exploration tool available for Linux, Windows, UNIX and FreeBSD. Its documentation includes a reference guide covering command-line arguments, port scanning techniques, firewall and IDS evasion, and timing and performance, with the man page translated into 15 languages.
NMDB is the Neutron Monitor Database, offering access to neutron monitor measurements from stations worldwide through a search interface. It provides real-time and historical data, which are free for non-commercial use under provider restrictions and remain the property of the individual data providers. Data may not have been validated or authorized by the respective PI.
Research data portal for exploring analytical chemistry records, including datasets.
A TorrentFreak article reporting that ReVanced, an open-source project providing patches for various Android applications, removed its Spotify Premium workaround after receiving a takedown notice from Spotify. The team complied to avoid escalation while disagreeing with the claim, and is seeking legal advice and consulting GitHub about a possible response.
Dataset repository covering atmospheric, with searchable datasets.
Research data portal for exploring atmospheric, oceanography and climate records, including geospatial data.
The National Oceanographic Data Centre for Italy provides a search and download service for marine data. It offers access to the largest Italian collection of controlled and validated physical and biogeochemical measurements, collected from 1880 to today in the Mediterranean Sea and neighboring sea basins. Data are provided by Italian marine science institutions, with minor contributions from other countries.
Searchable repository for finding atmospheric, oceanography and climate datasets and geospatial data.
A download page for Node.js, described as a free, open-source, cross-platform JavaScript runtime environment that lets developers create servers, web apps, command line tools and scripts. The page offers downloads, including prebuilt binaries and signed source tarballs, and links to release information, a changelog, and a blog post.
nomacs is a free, open source image viewer that supports multiple platforms and common image formats, including RAW and PSD. It also offers image editing such as cropping, resizing, rotating and color adjustments, and lets the same action be performed on multiple viewers for comparing images.
NONCODE is an integrated knowledge database dedicated to non-coding RNAs, excluding tRNAs and rRNAs, with a focus on lncRNAs. The current version is v6.0. It offers browsing by species and type, searching entries, statistics, BLAST similarity searches, disease-related information, genome locations, ID conversion, downloads, predicted functions and cross-species conservation.
Nonograms.org is a site dedicated to Japanese crosswords (nonograms), with catalogues of black and white and colour puzzles. Crosswords can be printed or solved online for free without registration. Registered users can save crosswords, and smart hints open squares following the rules of solving.
Nootka is an application for learning classical score notation, helping users understand the basics of reading and practicing musical scores. The user plays notes displayed by the app, which checks in real time whether they were played correctly. The application is free and open source.
NoPaste is an open-source paste service similar to Pastebin for storing code and sharing it via generated links. It works with no database and no back-end code: data is compressed and stored entirely in the shared link. Because of this design, the server hosting NoPaste cannot read or access the data, and the data cannot be deleted or censored from NoPaste.
Searchable repository for finding humanities and social datasets and datasets.
Project Runeberg is a volunteer effort to create free electronic editions of classic Nordic (Scandinavian) literature and make them openly available over the Internet. It states that it is free and gratis to use and free from advertising.
Find and access geosciences research data, with indexed geospatial data.
Normal Map Generator is a browser-based tool that converts 2D images, such as height maps or photos, into normal maps that simulate 3D surface detail. It offers real-time 3D preview, material presets, and exports in PNG, JPEG, or OpenEXR formats. All processing occurs locally in the browser.
NORMAN SusDat is a living database that merges chemical lists from the NORMAN Suspect List Exchange into a common format for screening purposes. It includes selected identifiers and predicted values and is under constant development. Users should consult the original lists to verify chemical information.
Browse research datasets and datasets related to geophysics.
The North American Breeding Bird Survey is a long-term monitoring program that tracks the status and trends of North American bird populations. It is a cooperative effort between the U.S. Geological Survey's Eastern Ecological Science Center and Environment Canada's Canadian Wildlife Service. Data are collected by participants along randomly established roadside routes, and analyses cover more than 400 bird species.
The GIS Hub is operated by the North Dakota State Geospatial Committee and North Dakota Information Technology. It is an infrastructure of geospatial data storage, web services, and application interfaces that supports state agencies' GIS development and shares common interest data with other government levels and the public. A data portal and Hub Explorer mapping tool provide access.
The Northern California Earthquake Data Center is a joint project of the Berkeley Seismological Laboratory and the U.S. Geological Survey. It serves as a permanent archive and distribution center for digital data on earthquakes in central and northern California, including time series data from seismic, GPS and other geophysical sensors. Online catalogs and web services support data queries.
Dataset repository covering agriculture, forestry and veterinary medicine, with searchable datasets.
