I thought it might be useful to some for me to list the tools i use regularly within my SharePoint development environment and exactly what I use them for.

In time maybe the list will shrink / expand and is no particular order.

STSDEV - is an application which creates SharePoint solutions and projects to help with deployment and development.

SharePoint Manager 2007 - I have tended to use this to snoop around the inner working of a site (You can view practically every property within SharePoint) . You can amend settings but in all honesty it's not recommended. A colleague insists he melted his entire site with it </me shrugs>. Use carefully :) 

MOSS Feature Generator - I like this application so much. It doesn't do anything big or clever but its simple and does what it says on a tin. I use this to export any created Content Types / Columns / Fields (created within the SharePoint UI) and export them out to be included in my STSDEV projects. It looks like it also does lists and their templates also but I haven't used it for this.

U2U CAML Query Builder - Great little visual CAML query tool for building CAML querys to be included in your views etc.

Imtech List Generator - Might be useful to some. Generates list instance XML for inclusion within your projects. Useful if you can't be bothered to generate GUID's and are not so sure about list templated ID's etc.

Hopefully this small list will be useful to some.