Data Springs, Inc.
- DotNetNuke Modules, tutorials, and development services
- http://www.datasprings.com/

The DotNetNuke Encyclopedia
- The Wiki web site for documentation and information.
- http://www.dnnwiki.net/

Free DotNetNuke Stuff
- A directory listing free DNN modules, skins, and code snippets
- http://www.freedotnetnukestuff.com

Snapsis Dynamic Website Services
- Provider of DotNetNuke modules and community support.
- http://www.snapsis.com/

Mitchel Sellers Blogs and DNN Modules
- A blog site focusing primarily on DotNetNuke, featuring tutorials and step by step guides to help get the most out of your DNN site. Open source DotNetNuke modules are also available
- http://www.mitchelsellers.com

Seablick Consulting
- DotNetNuke development blogs and tutorials to help improve DNN SEO placement and website functionality
- http://seablick.com

DotNetNuke
- Official site for the Dotnetnuke project. Contains online help and documentation, forums, blogs, downloads and showcase links.
- http://www.dotnetnuke.com/

Apollo Software
- Develops custom and commercial modules for DotNetNuke. Specialization: dynamic localization and intranet solutions.
- http://www.apollo-software.nl

dnnJungle
- Resources for the DotNetNuke Community. It includes tips and tricks for DotNetNuke development, module creation tutorials, free modules. Tools to ease module development: best framework setup, Visual Studio .NET Templates, CodeSmith templates.
- http://dnnjungle.vmasanas.net

SalarO
- DotNetNuke skinning solutions. [Commercial]
- http://salaro.com/

PurePortals
- PurePortals offers free DotNetNuke portal hosting.
- http://www.pureportals.com/

DotNetNuke ToolSet
- Focuses on building DotNetNuke modules and skins as well as doing DotNetNuke custom work.
- http://www.dnntoolset.com

My-ASP DotNetNuke Documentation
- This site provides free DotNetNuke Portal documentation and tutorials for version 1 and 2 end users. Also DotNetNuke skin gallery.
- http://portals.my-asp.net/Default.aspx?tabid=29

DNNStuff
- Dedicated to DotNetNuke developers. DotNetNUke modules (free and commercial), forums.
- http://www.dnnstuff.com

DotNetNuke Gurus
- House of information on DotNetNuke companies, professionals and gurus.
- http://dnngurus.com