What CSS frameworks have you found useful?

My extreme frustration with CSS is its inability to work nicely across different browsers (and different versions of browsers--yes, I'm talking about you IE).

What CSS frameworks have people come across and what are some of their specific benefits? I heard today about the Object Oriented CSS framework, but I haven't yet had time to look into it.

_{(source: blueprintcss.org)}

http://www.blueprintcss.org/

Rapid Blueprint CSS Layout With Boks

http://designshack.co.uk/articles/css/rapid-blueprint-css-layout-with-boks

Blueprint is a CSS framework, which aims to cut down on your development time. It gives you a solid foundation to build your project on top of, with an easy-to-use grid, sensible typography, useful plugins, and even a stylesheet for printing.

What does Blueprint have to offer?

* A CSS reset that eliminates the discrepancies across browsers.
* A solid grid that can support the most complex of layouts.
* Typography based on expert principles that predate the web.
* Form styles for great looking user interfaces.
* Print styles for making any webpage ready for paper.
* Plugins for buttons, tabs and sprites.
* Tools, editors, and templates for every step in your workflow.