I'm sure most any decent IDE under NT will give you some good features for finding matching parens and braces. Unfortunately the only knowledge I have is of the Unix world. Stock vi will jump to the matching paren/brace/bracket if you hit the percent (%) key. Also, vim ("improved") has some color features that highlight unmatched parens/braces/brackets.
Comment on Re: Text editor with collapsible braces??
The so-far-vapour (well, not really -- there are betas and maybe even NT ports at everybody's favorite site, vim.org) vim version 6 is supposed to bring code 'folding' which would do exactly what the poster was looking for.