Magic Directory
- A directory of magicians, clowns, hypnotists, balloon artists, puppeteers and related entertainers. It is based on the ODP, with added previews by Thumbshots, but accepts free submission of appropriate sites.
- http://www.magic-directory.com/

Melton Enterprises
- This Melbourne store includes a directory of Australian cricket taken from the ODP.
- http://www.meltonenterprises.net/

Mike's Community
- Forum, news and diary of events on Scottish ceilidh and salsa. Includes a directory based on the ODP.
- http://www.mikescommunity.com/

Metrónimo
- Music site uses ODP directory with Thumbshots and powered by PHPODP.
- http://www.metronimo.com/uk/music-directory/odp.php

Myfreebulletinboard
- Uses ODP directory powered by PHPODP.
- http://odp.myfreebulletinboard.com/

MetaDirectorio
- Uses ODP directory with Thumbshots.
- http://www.metadirectorio.com/

Manna Cabanna
- Uses the Open Directory's society category with Thumbshots.
- http://www.mannacabana.com/outerislands/

Messagetalk
- Portal uses ODP directory with Thumbshots.
- http://www.messagetalk.com/

ManofKnowledge
- A copy of the Open Directory taken from the RDF dump, with advertising supplied by Google.
- http://www.manofknowledge.com

Mediterranean Travel
- Uses ODP data to provide Mediterranean links.
- http://www.mediterranean-travel.it/

Metasearch
- Offering a combination search engine and directory based on ODP data.
- http://www.metasearch.biz/

Milliseconde Portal
- Directory using ODP data.
- http://www.milliseconde.net/portal/

MrEverything
- Web portal with search, directory using the ODP, real estate, shopping, news, finance, stock quotes, recipes, indoor air quality information, travel.
- http://www.mreverything.com

Master.com portal
- A demonstration from master.com of the search and directory it offers to webmasters, using the Open Directory data.
- http://okuka.master.com

Mirago
- UK search engine with main directory drawn from ODP Regional: Europe: United Kingdom supplemented with listings from Mirago. Also offers the complete ODP.
- http://www.mirago.co.uk/

Mars Open Directory
- The "Mars" section of the Open Directory Project, maintained by the MarsNews.com. Gateway.
- http://www.marsnews.com/directory/

MusicMoz
- Comprehensive music directory, edited by volunteers. Lists and accepts submissions of music-related websites, reviews, and artist and recording information.
- http://musicmoz.org/