For me, it’s the YUI Library CSS Tools: it has a “reset”, “base” and “fonts” for a nice and consistent style and typography foundation, and “grids”... it’s basic yet complete and very ease to use
I like the idea of WYMstyle but I don’t quite like the implementation. I’m currently working on my own framework with the same idea but fixing the issues I have with WYMstyle.
We’re using 960 with customization for our new company site.
We’re trying to discipline ourselves to work with it but its been challenging. Old habits…
I think for future projects we might just set a base typography framework and not limit ourself to a grid framework.