Mailup - Mailup API

| mailing | email | marketing | sms | messagning |

MapQuest - MapQuest Developer

| location| maps |

MarkLogic - MarkLogic Developer

| nosql | database | cloud |

Mashery - Mashery Developer Portal

| apis | cloud | proxy |

MasterCard - MasterCard Developers

| billing | ecommerce | analytics | identity"

MediaTek - MediaTek Development Platforms

| publishing |

Medium - Medium Developers

| publishing | content |

Meetup - Meetup API

| events | social |

Mesosphere - Mesosphere Resources

| apache | mesos |data center |

MessageMedia - MessageMedia Developers

| sms | messaging | enterprise |

Micorsoft - XBox Game developers

| gaming | games | video | streaming | console | "

Microsoft - Bing for partners

| location | maps | mobile | speech | translation |

Microsoft - Developer

| windows | azure | visual studio | office |mobile | cloud | pc | desktop | .net | c++ | skype | sharepoint |mixed reality | dynamics 365 |

Microsoft - Yammer Dev Center

| social | networking | communication | enterprise |

Miutedock

| time tracking | billing | reporting | cloud |