4W Consulting: Consulting company specializing in providing expert Cache and MUMPS, and related technologies, application development as well as systems management services.
CDE Software Systems Corp: MUMPS programming available for Intersystems DTM-PC and DT-MAX platforms available to the greater Chicago and Milwaukee metro areas.
Forest Software: A software house specialising in M (Mumps). It was formed in 1983 and can provide systems design, programming and support of M based systems.
George James Software: Program development, consulting, training, support services; VC/m web-enabled configuration management system to manage documents and source code across many OSs, and add-in tools for Caché and related M technologies.
GT.M Database Technology from Sanchez: GT.M[tm] is a high-performance database engine. Optimized for transaction processing, GT.M is also an application development platform and a compiler for the ANSI/ISO standard M language. GT.M. is free to users on the x86 GNU/Linux platform.
Hello, World program: Simple example of MUMPS program.
InterSystems M Technologies: A forum and web site for users of InterSystems tools and M in general
Jumps: Java from MUMPS: comprehensive framework for automated migration from MUMPS language and runtime, to Java and relational databases (RDBMS); implemented as compiler that compiles MUMPS code into Java.
M FAQs: Frequently Asked Questions about M/MUMPS
M Info Source: The Mumps, Cache and M grand central. Home of M Web Magazine. Links, programs, and articles.
M Technology Association United Kingdom and Ireland (MUG-UK& I): A non-profit educational organisation. Its aims are to further the utilisation, improvement and understanding of Cache and the M Technology language and its dissemination within the UK and Ireland.
M User Group Deutschland: The German MUG (in German, of course)
M Web Magazine: "Welcome": The web's only (now-defunct) M zine.
MDC: MUMPS Development Committee: Home: language description, MWAPI, OMI, standards, meetings, implementations, free versions, related products and services, humor.
MSM-Workstation: Information about MSM-WS, an M implementation for Win32
MTRC: has info about the MUMPS (M) computer language. Features include an M Job Opportunities database, the M User Directory, and links about MUMPS.
MUMPS: Long, growing article, with links to related topics. [Wikipedia]
M[UMPS] by Example: An online copy of part of a book by the same name
Real Software Co.: Makes M21, implementation of M language/database for the 21st Century.
The Genesis of MUMPS and MUG: Story of the creation of the language at The Massachusetts General Hospital, and its development into a procedural, interpreted general-purpose language, oriented toward database use. By Glen Steinbach.
The Mumps Compiler and MultiDimensional and Hierarchical Toolkit: Compiler and interpreter for Linux, Solaris, Windows. Implements much of most recent Mumps standard. [free]
The oMega Project: Implementation of M-Technology+ for Linux. [Open Source]