Which "toolkit designed to kickstart development of webapps and sites" that "includes base CSS and HTML for typography, forms, buttons, tables, grids, navigation" do you use, if any.
Being a big fan of Blueprint CSS, I've been finding it very useful on that purpose. Give a try.
<a href="http://www.blueprintcss.org/" rel="nofollow">http://www.blueprintcss.org/</a><p>Or keep searching on Quora & Stackoverflow. Here is an example that might be working for what you've been searching.
<a href="http://www.quora.com/Are-there-any-web-2-0-UX-UI-development-frameworks" rel="nofollow">http://www.quora.com/Are-there-any-web-2-0-UX-UI-development...</a><p>Focussing on Javascript UI libraries could also work.
<a href="http://speckyboy.com/2010/05/17/15-javascript-web-ui-libraries-frameworks-and-libraries/" rel="nofollow">http://speckyboy.com/2010/05/17/15-javascript-web-ui-librari...</a>