SharePoint developer Toolbox

The follwoing are the some of the useful tools for sharepoint and general web development.

CAML Builder:

http://weblogs.asp.net/jan/archive/2008/05/28/new-version-of-the-caml-query-builder-tool.aspx

Internet Developer Toolbar:

http://www.microsoft.com/downloads/details.aspx?familyid=e59c3964-672d-4511-bb3e-2d5e1db91038&displaylang=en

Firebug

https://addons.mozilla.org/en-US/firefox/addon/1843

Google Chrome( comes with document inspector )

Chrome

WSPBuilder

http://www.codeplex.com/wspbuilder

BDCMetaMan

http://www.lightningtools.com/default.aspx