Runtime libraries
Microsoft .NET Framework Version 2.0 Needed to run the dot net programs. These libraries are only needed when using DotNetNuke 4.x. http://www.microsoft.com/downloads/details.aspx?familyid=0856eacb-4362-4b0d-8edd-aab15c5e04f5&displaylang=en
Development tools
Visual Web DeveloperFreeware development environment from Microsoft (r)http://msdn.microsoft.com/vstudio/express/vwd/download/default.aspx
or
Visual Studio 2005Needed for the development of your moduleshttp://msdn.microsoft.com/vstudio/
Databases and tools for running the DotNetNuke web application
Microsoft SQL Server database Freeware MS SQL Database http://msdn.microsoft.com/vstudio/express/sql/download/default.aspx
SQL Server Management Studio Express Management tool for SQL Express. You can use this tool to manage your databases, for creating, modifieing and delete databases or database objects. http://msdn.microsoft.com/vstudio/express/sql/download/
The DotNetNuke web application
DotNetNuke The DotNetNuke site files, needed to deploy your DNN site. You can also download here the source code for the DotNetNuke webapplication, and also a lot of sources from DotNetNuke modules. http://www.dotnetnuke.com/tabid/125/default.aspx
Nice to have tools for DNN Development DNN KickStart Saves a lot a time to develop new DNN Modules. With this tool you create DotNetNuke modules within 5 minutes, that are complete and ready to use. DNN Kickstart
Create a module manually Excellent post about how to create a DotNetNuke module Create a DNN Module
Consolas Font Pack for Microsoft Visual Studio 2005 Special font for TFT display and Visual Studio 2005, especially with ClearType enabled. http://www.microsoft.com/downloads/thankyou.aspx?familyId=22e69ae4-7e40-4807-8a86-b3d36fab68d3&displayLang=en&oRef=http://www.vbcentral.nl/Nieuws/VBcentral/tabid/61/Default.aspx (ClearType HowTo)
Toolkit for .NET 1.1 "MSBee" Power Toys for Visual Studio An addition to MSBuild that allows developers to build managed applications with MSBuild using Visual Studio 2005 projects that target .NET 1.1. http://www.microsoft.com/downloads/details.aspx?FamilyID=e0d0776f-25c4-444a-a6b9-71d06826f5b4&DisplayLang=en