Search results

MapLight

maplight.org

MapLight provides data series focused on United States federal campaign finance and congressional bills, intended for research and media organizations. Its Bill Positions dataset tracks which companies and organizations support or oppose specific bills moving through Congress, sourced from public records including company websites, press releases, and government documents. The dataset covers 2007 to 2021, includes more than 225,000 positions on over 14,000 bills, is no longer updated, and is available for academic and research use for a modest licensing fee.

Maritime Stepping Stones

mass.cultureelerfgoed.nl

Maritime Stepping Stones (MaSS) is a worldwide source for stories about wrecks and archaeological sites underwater. An interactive map with filters covers periods from Prehistory to Modern Times, including VOC and Second World War wrecks. Visitors can contribute sites, information, videos and images, which are checked before publication.

Markdown Extractor

notionconvert.com

Notion To MD is a free and open-source Node.js library that fetches and converts Notion pages into Markdown, HTML, or custom formats through a plugin system, with configurable media handling. Version 3 is no longer supported and users are directed to upgrade to v4.

Markdown Guide

markdownguide.org

The Markdown Guide is a free and open-source reference guide explaining how to use Markdown, a markup language for formatting documents. It offers a getting started guide for novices, a basic syntax page, and extended syntax for tables, fenced code blocks and automatic links.

Markpad

markpad.sftwr.dev

Markpad is a markdown viewer and editor for Windows, macOS, and Linux, described as a tabbed Notepad alternative. It offers a GFM preview with syntax highlighting, KaTeX math, Mermaid diagrams, and an embedded Monaco editor with Vim keybindings. It is free and open source and is described as having zero telemetry.

massCode

masscode.io

massCode is a free and open-source developer workspace for code snippets, Markdown notes, HTTP requests, calculations, and quick developer utilities. It is a local-first desktop app organized into Spaces, with a built-in AI assistant that connects to a user's own AI provider or a local model.

Open source video editor for cutting, arranging, and exporting simple video projects.

Mastodon

joinmastodon.org

Mastodon is a free and open-source decentralized social media platform. Each server is an independent entity that interoperates with others, and accounts can follow anyone across servers with posts in chronological order.

Mastodon Apps

joinmastodon.org

This Mastodon page lists official and third-party apps for the decentralized social network, organized by platform including Android, iOS, Web, Desktop and Retro computing, with free, paid and open-source labels. It also notes a progressive web app and an open API.

Material Maker

rodzilla.itch.io

Material Maker is a procedural materials authoring tool based on the Godot Engine, with an experimental 3D model painting engine. Materials and brushes are defined as node graphs, and most nodes are GLSL shaders. Materials can be exported for the Godot, Unity and Unreal game engines. It is available for Windows, macOS and Linux, and the source code is on GitHub.

MathURLs

mathurls.com

MathURLs is a mathematics news aggregator that collects math news from popular math websites in one place. Users can choose sites to search from. Personal preferences, including keyword highlighting, filtering, pinned articles, push notifications and customized RSS feeds, are listed as upcoming features. Search supports operators such as AND, OR, NOT and prefix wildcards.

Maxim AI

getmaxim.ai

Bifrost is an open-source AI gateway for LLMs, MCP and agents, offered by Maxim AI. It provides routing, governance, guardrails and observability, and is described as a drop-in replacement for AI SDKs. Enterprise adds features such as SSO, RBAC, adaptive load balancing, cluster mode and in-VPC deployment, free for 14 days.

Maxima

maxima.sourceforge.io

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.

MC Musiceditor

mcmusiceditor.com

MC Musiceditor is free, open source (GPLv2 or above) music notation software made for Windows XP and above, developed by Reinier Maliepaard. It uses a modification of the ABC language, supports note and chord entry, score preview and MIDI playback, and exports to MIDI and PDF. The software is donateware and still maintained.

MCJars

mcjars.app

MCJars is a website that lets Minecraft server owners download server jars and other files, and reverse lookup project versions. The site is open source on GitHub and states it will never have ads. It reports itself as not affiliated with Mojang AB.

McOsu

store.steampowered.com

McOsu is a free open-source circle-clicking rhythm game practice client for osu! beatmaps with Virtual Reality support. It is developed separately from osu! and has no direct affiliation with osu! or ppy Pty Ltd. It only supports osu!(standard) beatmaps, and the developer does not recommend it for players who have never played osu! before.

MCreator

mcreator.net

MCreator is open source software for making Minecraft Java Edition mods, Bedrock Edition Add-Ons, resource packs and data packs, using an interface designed to be easy to learn or an integrated code editor. The site states it is used by Minecraft players, mod developers, for education and by STEM workshops, and lists a full 2026.2 release supporting Minecraft 26.1.

MDCalc

mdcalc.com

MDCalc is a source for medical equations, algorithms, scores, and guidelines. It offers a library of calculators, including the Cockcroft-Gault creatinine clearance equation, a weight-based levothyroxine dose calculator, CKD-EPI GFR equations, mean arterial pressure, and the SpO₂/FiO₂ ratio. Tools can be browsed by specialty and filtered by calculation purpose.

Meaning of

kennybastani.com

Meaning of is the personal blog of Kenny Bastani, covering open source software, graph databases, cloud native architectures, information theory, artificial intelligence, and machine learning. As of September 18, 2025, the blog is no longer maintained, with readers directed to the author's GitHub or LinkedIn profiles.

MediaElch

kvibes.de

MediaElch is a media manager for movies, TV shows, concerts and music. It imports new files, renames them automatically and creates nfo files for use with Kodi, and it comes with scrapers including The Movie DB, The TV DB, IMDB, fanart.tv and The Audio DB. It is available for macOS, Windows and Linux and is open source.

MediaInfo

mediaarea.net

MediaInfo is a tool that displays technical and tag data for video and audio files. It shows container, video, audio, text and chapter details, and supports formats including MPEG-4, Matroska, AVI, H.264 and MP3. It is available with a graphical interface, command line interface or library version, and is open-source software.

The Medical Expenditure Panel Survey (MEPS) is a set of large-scale United States surveys covering families, individuals, their medical providers, and employers. It is the most complete source of data on U.S. health care costs, health care use, and health insurance coverage. The survey is conducted by the Agency for Healthcare Research and Quality, part of the Department of Health and Human Services.

Medito

meditofoundation.org

Medito is a free meditation app built by a non-profit foundation. It offers hundreds of guided meditations, sleep stories, courses and breathing exercises, with no ads, paywalls or account required. The app is open source and available on the App Store and Google Play.

Meilisearch

meilisearch.com

Meilisearch is a search engine that indexes content and exposes it through search, conversational interfaces and APIs. It supports full-text search, semantic search and hybrid search, and can be used on the managed Meilisearch Cloud or self-hosted as an open source engine. Official SDKs are available for several programming languages and frameworks.