Similar to SpamAssassin

Lotus Improv

IBM Lotus Symphony

MapServer

Wolfram (software)

Memcached

MEncoder

Mendeley

Metasploit

MindTouch

Mined (text editor)

Miro (video software)

MLDonkey

Mnemosyne (software)

Mobirise

Mojo (programming language)

Mpv (media player)

Mumble (software)

Nashorn (JavaScript engine)

.NET

NetIQ eDirectory

Netscape Navigator 9

NetSurf

Nl (Unix)

Nmap

Od (Unix)

OpenCL

OpenLDAP