AppDev
AppDev develops self-study learning products - certainly the best content available anywhere if you want to learn to work better with Microsoft software products. AppDev content is built by developers for developers. They offer self-study CD-ROM and online learning products, and license their courseware to companies and schools to conduct their own training. A23 also builds custom courseware for AppDev's technical publishing division.

CoDe Magazine (EPS Software)
This is a great bi-monthly publication for Visual Studio .NET developers. A23 also helps to recruit new authors.

Microsoft
The largest software company in the world. A23 specializes in the development of white papers and product comparison papers that Microsoft makes available online through MSDN and TechNet.

OfficeZealot
If you are a developer using Microsoft Office, this is the site to visit to see blogs from insiders at Microsoft as well as leading Office developers around the world. A23 partnered with OfficeZealot to develop a corporate-wide SharePoint site at a media company based in the Minneapolis area.

Tech Conferences, Inc.
Tech Conferences, Inc., a division of Penton Media, offers IT conferences for Microsoft Windows system administrators, Microsoft Exchange administrators, Microsoft SQL Server DBAs and developers, Microsoft Visual Studio developers, and Microsoft Office developers. Most conferences are held in the spring and the fall.