1. Eric Woodruff's nDoc style GUI - http://www.codeplex.com/Wiki/View.aspx?ProjectName=SHFB
2. SandcastleGUI - http://www.inchl.nl/SandcastleGUI/
3. Sandcastle CHM-compile BAT script & configuration utility - http://www.codeproject.com/useritems/SandcastleCreateBat.asp