Is the only such tool I know of - but you have to set it up on the CVS server I think.

Given my preferences, I just check out whole repositories and browse away using emacs, grep, vi, whatever...

If you're disk constrained, check out a couple sub directories and then blow them away before checking out others.

After all, any CVS browser is going to have to copy the file you're browsing to your machine anyhow so its not like you'll save big time by not checking the stuff out.