New Post: Software In Use

Free software.
NUnit (version 2.4.8) http://www.nunit.org/index.php?p=download
Programmers File Editor http://www.lancs.ac.uk/staff/steveb/cpaap/pfe
Expresso http://www.ultrapico.com/Expresso.htm
PartCover http://sourceforge.net/projects/partcover/
Sandcastle http://www.codeplex.com/Sandcastle/Thread/List.aspx
Sandcastle Help Builder http://www.codeplex.com/SHFB/Release/ProjectReleases.aspx?ReleaseId=9848
GhostWriter http://www.roland-weigelt.de/ghostdoc/
Microsoft Source Analysis for C# http://code.msdn.microsoft.com/sourceanalysis
ComponentOne Community Spell Checker http://www.componentone.com/SuperProducts/IntelliSpell/

Paid for software
Visual Studio 2008 Pro (however code should be usable by VS2008 express versions)
SQL2005/2008 Developer Edition (however TSQL should be usable by express versions)
ReSharper.Com http://www.jetbrains.com/resharper/download/ was used to optimise the code.
Vipre from http://www.sunbelt-software.com - an excellent anti-virus and anti-spyware.