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Masto.host is a fully managed hosting service for Mastodon instances. Users choose a plan, select a domain they own or a free Masto.host subdomain, and subscribe by credit card or PayPal. Hosting is created and Mastodon installed automatically, without code changes. Plans range from $6/month to $89/month plus tax, with estimated active user limits from 5 to 2000.
Mastodon Lists Manager is a static browser-based tool that performs bulk actions on Mastodon lists, such as viewing followed users who are not in lists and adding them, and unfollowing multiple users at once. Data is sent only to the user's Mastodon instance and stored in the browser's localStorage.
Block explorer for Matchain, showing transactions, blocks, addresses, tokens, and network activity.
Materials Cloud Archive is a moderated repository. Submitted records are reviewed by Materials Cloud moderators before publication. Registered users get a personal work area for storing and tracking submitted records, creating new versions and changing references and keywords. DOIs are registered when a record is created and become active when the record is published.
Math Planet is a free platform for learning mathematics, offering high school courses in Pre-algebra, Algebra 1, Algebra 2 and Geometry, plus SAT and ACT preparation with practice tests and tips. It is run by Mattecentrum, a non-profit organization.
Mathematical Olympiads Discord Server (MODS) is a Discord server founded in January 2019 for Mathematical Olympiad enthusiasts of all ages to learn and socialise. Its staff post a problem-of-the-day, host monthly contests, and organise other server activities. It is part of the International Science Olympiad Discord Network.
Maxima is a free, open-source computer algebra system written in Lisp with an emphasis on symbolic computation. It is based on the DOE-MACSYMA system and licensed under the GPL. Its capabilities include symbolic integration, 3D plotting, solving differential equations, manipulation of symbolic and numerical expressions, and high-precision numerical calculations. It runs on Windows, Linux, and Mac, with both terminal and notebook interface options, and has an active user community with frequent updates.
Media Mining Memory – Nigeria is a layered digital archive tracking representations of mining in Nigerian newspapers, state reports and community narratives from 1935 to 2025. It combines a print media corpus, structured metadata, NLTK text analysis and cartographic views, including an Enugu-focused exhibit and classroom activities.
MeetGeek is an AI meeting platform that records, transcribes and summarizes meetings, then automates follow-up work. It can join online, hybrid or in-person meetings with a bot or bot-free through desktop, mobile and browser options. Meeting Skills and voice agents act on meetings through tools the user already uses. It is free to start.
Meetup is a platform for finding local groups and events and for starting a group. People use it to meet others who share their interests and to connect over activities such as hiking, reading and networking.
Melies is an AI studio for filmmaking that generates images, videos, movie posters, voices, music and sound effects. It offers 30+ AI models and a library of 150+ AI actors. A CLI is available for image, video and movie poster generation from the command line. Plans include monthly credits.
mergerfs is a FUSE-based union filesystem aimed at simplifying storage and management of files across numerous commodity storage devices. It logically combines filesystem paths into a single mount point and acts as a proxy to the underlying paths. Paths can be added or removed without impacting the rest of the data, and file selection and creation placement are configurable. It is similar to mhddfs, unionfs, aufs and DrivePool.
Meshy is a design tool that generates mesh gradients from a given color palette. Each gradient is unique to an id and color hex codes that act as a seed for recreating it. A four-color palette is used, and each color covers a different amount of area.
Met Office is the UK's national weather and climate service. Its research activities span weather science, climate research, applied science and foundation science. The organisation provides public access to weather forecasts, UK weather warnings, maps and charts for the UK and other global regions, climate change explanatory content, specialist forecasts for coastal, mountain and space weather, and educational resources for schools, alongside dedicated weather and climate research programmes.
Block explorer for MetaChain Mainnet, showing transactions, blocks, addresses, tokens, and network activity.
Block explorer for Metal L2, showing transactions, blocks, addresses, tokens, and network activity.
Block explorer for Meter Mainnet, showing transactions, blocks, addresses, tokens, and network activity.
Block explorer for Metis Andromeda Mainnet, showing transactions, blocks, addresses, tokens, and network activity.
Block explorer for MFX Network, showing transactions, blocks, addresses, tokens, and network activity.
The Marine and Hydrokinetic Data Repository (MHKDR) is a U.S. Department of Energy repository housing publicly accessible data from research, development, demonstration and deployment activities funded by the DOE Water Power Technology Office's Marine Renewable Energy program. It provides open access to marine energy data and includes featured datasets such as PacWave and high resolution wave hindcast data.
A privately owned website, not operated by any state government agency, that offers tools to search Michigan public records. It covers criminal, court, vital and inmate records among other categories, and cites the Michigan Freedom of Information Act as the basis for public access.
Marine Vessel Traffic page for tracking military vessels and related maritime activity.
An unofficial biome map of a Minecraft world seed for version 1.8. It can act as a village finder, slime finder and ocean monument finder, and users can load a saved game, enter a seed or get a random map. Hovering shows biome names, and shading indicates hilliness.
Block explorer for Mintara Mainnet, showing transactions, blocks, addresses, tokens, and network activity.
