
Altamira Software was founded in Mill Valley, California by Dr. Alvy Ray Smith, Eric Lyons and Nicholas Clay in 1991.

AltspaceVR is a software startup company based in Redwood City, California that was founded in 2013, and launched its initial product in May 2015.

FoxPro was a text-based procedurally oriented programming language and database management system (DBMS), and it was also an object-oriented programming language, originally published by Fox Software and later by Microsoft, for MS-DOS, Windows, Macintosh, and UNIX. The final published release of FoxPro was 2.6. Development continued under the Visual FoxPro label, which in turn was discontinued in 2007.

GitHub, Inc. is a subsidiary of Microsoft which provides hosting for software development and version control using Git. It offers the distributed version control and source code management (SCM) functionality of Git, plus its own features. It provides access control and several collaboration features such as bug tracking, feature requests, task management, continuous integration and wikis for every project. Headquartered in California, it has been a subsidiary of Microsoft since 2018.

GreenButton was a New Zealand-based software firm. The company specialized in moving independent software vendors (ISVs) and enterprises to cloud computing. Founded in 2006, GreenButton was based in Wellington, New Zealand, with additional offices in Palo Alto, California and Seattle. GreenButton was acquired by Microsoft on 2 May 2014; its technologies were integrated into its Azure service.

Havok is an Irish software company founded in 1998 by Hugh Reynolds and Steven Collins, based in Dublin, Ireland and owned by Microsoft. They have partnerships with Activision, Electronic Arts, Nintendo, Microsoft, Sony, Bethesda Softworks and Ubisoft.

Outlook.com is a personal information manager web app from Microsoft consisting of webmail, calendaring, contacts, and tasks services. Founded in 1996 by Sabeer Bhatia and Jack Smith, Hotmail was acquired by Microsoft in 1997 for an estimated $400 million and relaunched as MSN Hotmail, later rebranded to Windows Live Hotmail as part of the Windows Live suite of products. Microsoft phased out Hotmail in October 2011, relaunching the service as Outlook.com in 2012.

Phase One Media Pro was a commercial digital asset management cataloging program for Microsoft Windows and Apple OS X operating systems. It was the next version of iView MediaPro which Microsoft acquired in June 2006, and sold again in May 2010 to Phase One, which also makes the Capture One raw converter software. The software was aimed at professionals and photo enthusiasts who needed a photo manager which made it easier to manage photo and video assets, especially very large resolution image files and libraries with many items.

LinkedIn is an American business and employment-oriented online service that operates via websites and mobile apps. Launched on May 5, 2003, the platform is mainly used for professional networking, and allows job seekers to post their CVs and employers to post jobs. As of 2015, most of the company's revenue came from selling access to information about its members to recruiters and sales professionals. Since December 2016, it has been a wholly owned subsidiary of Microsoft. As of December 2020, LinkedIn had 760 million registered members from 150 countries.

Maluuba is a Canadian technology company conducting research in artificial intelligence and language understanding. Founded in 2011, the company was acquired by Microsoft in 2017.

Microsoft Dynamics 365 Business Central (D365BC) is an enterprise resource planning (ERP) system from Microsoft. The product is part of the Microsoft Dynamics family, and shares the same codebase as NAV and NAV's C/AL language is being phased out in favor of the new AL language.
Microsoft Dynamics NAV is an enterprise resource planning (ERP) app from Microsoft. The product is part of the Microsoft Dynamics family, and intended to assist with finance, manufacturing, customer relationship management, supply chains, analytics and electronic commerce for small and medium-sized companies and local subsidiaries of large international groups. For modifications of the system, the proprietary programming language C/AL is used.

Microsoft Mobile was a subsidiary of Microsoft involved in the development and manufacturing of mobile phones. Based in Espoo, Finland, it was established in 2014 following the acquisition of Nokia's Devices and Services division by Microsoft in a deal valued at €5.4 billion, which was completed in April 2014. Nokia's then-CEO, Stephen Elop, joined Microsoft as president of its Devices division following the acquisition, and the acquisition was part of Steve Ballmer's strategy to turn Microsoft into a "devices and services" company. Under a 10-year licensing agreement, Microsoft Mobile held rights to sell feature phones running the S30+ platform under the Nokia brand.

Microsoft SwiftKey is a virtual keyboard app originally developed by TouchType for Android and iOS devices. It was first released for Android in July 2010, followed by an iOS release in September 2014 after Apple allowed third-party keyboard support.

MileIQ is an American-based technology company that develops a mileage tracking and logging app. The app uses automatic mileage tracking to calculate mileage while driving for business purposes that can then be used to report for reimbursement and potentially a tax deduction with the IRS, being attributed as the first mobile app to passively track such data. MileIQ has been compared to Fitbit for driving and has been discussed in national business publications that include Fast Company, Fortune, and Forbes.

Multimap.com was a provider of mapping and location-based services. Founded around 1997 and based in London, it was acquired by Microsoft in 2007 for $50 million.

Outlook.com is a personal information manager web app from Microsoft consisting of webmail, calendaring, contacts, and tasks services. Founded in 1996 by Sabeer Bhatia and Jack Smith, Hotmail was acquired by Microsoft in 1997 for an estimated $400 million and relaunched as MSN Hotmail, later rebranded to Windows Live Hotmail as part of the Windows Live suite of products. Microsoft phased out Hotmail in October 2011, relaunching the service as Outlook.com in 2012.

Rare Limited, also known as Rareware, is a British video game developer and a studio of Xbox Game Studios based in Twycross, Leicestershire. Rare are known for their games spanning many genres, which include platforming, first-person shooter, action-adventure, fighting, and racing. Some of their most popular titles include games from the Donkey Kong, Banjo-Kazooie, Viva Piñata, and Battletoads series, as well as games like GoldenEye 007 and Sea of Thieves.

Skype is a proprietary telecommunications application that specializes in providing video chat and voice calls between computers, tablets, mobile devices, the Xbox One console, and smartwatches over the Internet. Skype also provides instant messaging services. Users may transmit text, video, audio and images. Skype allows video conference calls.

Skype Technologies S.A.R.L is a telecommunications company headquartered in Luxembourg City, Luxembourg and Palo Alto, CA, United States, whose chief business is the manufacturing and marketing of the video chat and instant messaging computer software program Skype, and various Internet telephony services associated with it. Microsoft purchased the company in 2011, and it has since then operated as their wholly owned subsidiary; as of 2016, it is operating as part of Microsoft's Office Product Group. The company is a Société à responsabilité limitée, or SARL, equivalent to an American limited liability company.

Sunrise is a discontinued electronic calendar application for mobile and desktop. The service was launched in 2013 by designers Pierre Valade and Jeremy Le Van. In October 2015, Microsoft announced that they had merged the Sunrise Calendar team into the larger Microsoft Outlook team where they will work closely with the Microsoft Outlook Mobile service.

Tellme Networks, Inc. was an American company founded in 1999 by Mike McCue and Angus Davis, which specialized in telephone-based applications. Its headquarters were in Mountain View, California.

Wunderlist is a discontinued cloud-based task management application. It allowed users to create lists to manage their tasks from a smartphone, tablet, computer and smartwatch. Wunderlist was free; additional collaboration features were available in a paid version known as Wunderlist Pro, released April 2013.

Xamarin is a Microsoft-owned San Francisco-based software company founded in May 2011 by the engineers that created Mono, Xamarin.Android and Xamarin.iOS, which are cross-platform implementations of the Common Language Infrastructure (CLI) and Common Language Specifications.

Yammer is a freemium enterprise social networking service used for private communication within organizations. Access to a Yammer network is determined by a user's Internet domain so that only individuals with approved email addresses may join their respective networks.