medRxiv is a preprint server for biology and health sciences operated by the nonprofit organization openRxiv, which is dedicated to advancing scientific communication. It hosts preprint research across a range of health subject areas including Addiction Medicine, Cardiovascular Medicine, Epidemiology, Oncology, Pediatrics, and Public and Global Health.
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Memory League is a platform that provides memory training tools, hosts competitive events such as championships and world tours, maintains rankings and leaderboards, offers daily challenges and includes a user forum for participants.
This website, created by Michael Bach, hosts a collection of 156 non-scary optical illusions and fascinating visual phenomena. It emphasizes interactive exploration, offers scientific explanations of underlying visual mechanisms, and contains no adverts.
MicrosporidiaDB is a database that provides FAIR access to genomic data for eukaryotic microbes, including protists and fungi, as well as hosts and arthropod vectors of pathogenic species. It is part of the VEuPathDB project, which works to secure long-term financial sustainability for globally relied-upon biomedical data resources.
MiroPPB is a personal site that hosts radio shows and applications, including sections related to trance music such as A State of Trance and Uplifting Only. It also offers CydiaManager, described as a solution for developers who host their own Cydia repository and find creating and handling Release and Packages files hard.
Mizuumi Wiki is a service that hosts wiki pages for niche versus and fighting games. It lists active game wikis alongside legacy wikis kept for reference. Editors contribute through accounts, and registration requires a waiting period before editing.
Mobile Abyss is a site offering HD to 8K phone wallpapers and lock screens for Android, iPhone and other devices, with free downloads and new images every day. It hosts wallpapers in various categories and holds monthly contests and community events.
ModDB is a site covering game development and modding for Windows, Mac and Linux, with downloads of user-generated content. It hosts articles and news about games and mods, including projects such as Doctrine Strike, a free-to-play modern RTS by Triple-O Games.
Monitor Tests hosts monitor-related software by ToastyX, including the Custom Resolution Utility, pixel clock patchers and the Scaled Resolution Editor. A monitor database and a CRU 2.0 rewrite are listed as future plans.
Moonshot AI is a GitHub organization focused on AI and machine learning research and development. As of the listing snapshot, it hosts 42 public repositories, with areas of work including research, benchmarks, agents, service infrastructure, and community engagement, and its code is available on GitHub.
MubertAI/Mubert-Text-to-Music is a GitHub repository maintained by MubertAI. It hosts a simple notebook that demonstrates prompt-based music generation via the Mubert API, providing a reference implementation for users looking to generate music from text prompts using the service.
MyGeoHub is a hub built on the HUBzero platform that supports geospatial modeling, data analysis and visualization for research and education communities. It hosts groups, datasets, tools, training materials and educational content, and offers a free account for accessing resources. It also allows groups to be hosted on the site.
MyRiceBase is a curated biological database that centralises genomics and transcriptomics information for rice quality traits, with a focus on amylose and antioxidants. It hosts single nucleotide polymorphisms (SNPs), genes and biological networks that users can search, browse or download. Search functionality supports queries based on SNP ID, gene ID and rice variety name. The platform also provides Tableau and Neo4j tools for data visualisation.
Myth-Weavers is a play-by-post roleplaying site that hosts active games across many tabletop systems. It provides free character sheets, dice, and forums for collaborative storytelling, along with game management, player roles such as game masters and readers, and privacy controls. The site has offered play-by-post roleplaying since 2006.
nadeko.net is an independent privacy services provider run by a single person from Chile since 2021. It hosts more than 30 services, including alternative frontends for Reddit, Imgur, Fandom wiki pages, Pinterest and Pixiv, alongside a Vaultwarden server and other tools. The services are backed by donations at the time of the page.
The Naked Scientists is an online science radio show and podcast that also publishes science articles, interviews and a discussion forum. The site hosts science podcasts and science radio shows and offers science features written by scientists internationally.
The National Eye Institute Data Commons is an official U.S. government repository for data and resources supported by the National Eye Institute. It hosts materials including next-generation sequencing data and associated tools, eyeGENE datasets and DNA samples for rare inherited eye disease research, the AMD IBI dataset, cone detection data, the Cat-Map resource, the Platform for Analysis of scEiad (PLAE), and materials related to perception, cognition and action research. Users can search the resource catalog.
It is the institutional repository of the National Fisheries University. It hosts academic works including dissertations and journal articles, with a total of 1,299 records as of the snapshot. One recent submission is a 2026 article from the Journal of National Fisheries University documenting light-trap sampling of larval and juvenile fish species at the Gotsu Lighthouse in Shimane Prefecture, Japan.
The National Nuclear Data Center hosts databases of nuclear structure, decay and reaction data. ENSDF contains evaluated data for 3,171 nuclides, and NuDat provides nuclear structure and decay information. EXFOR holds experimental nuclear reaction data, and ENDF provides evaluated reaction data in the ENDF-6 format. XUNDL covers experimental nuclear structure and decay data.
The National Space Science Data Center is a space science data repository that hosts datasets and associated resources for space missions including SVOM, Tianwen-1, Chang'e lunar exploration missions, Double Star, and related projects. It provides access to lunar and planetary data products, product specifications, metadata, and the latest released space science datasets.
nbshare.io is a platform for learning data analytics using Python and R. It hosts a collection of notebooks covering topics including artificial intelligence, machine learning, basic Python coding, data analytics, web scraping and other related technical subjects.
Online hub for open, community-curated paleoecological and paleoenvironmental data, supporting global-change research and education. It hosts constituent databases and data, including pollen, vertebrate fauna, charcoal, stable isotope and geochronologic records.
The Network Repository is the first interactive network dataset repository, offering real-time interactive graph visualization and analytics for network datasets. It hosts a wide range of network datasets organized into categories including miscellaneous networks, cheminformatics, animal social networks, social networks, power networks, labeled networks, dynamic networks, technological networks, brain networks and other specialized network types.
NETworkManager is a free, open-source tool for managing networks and troubleshooting network problems. It includes 28 built-in tools such as an IP scanner, port scanner, ping monitor, DNS lookup, remote desktop and PowerShell in a single interface. It offers profiles for organizing hosts, and no license, subscription or telemetry.