vw vh are units that are essentially the same as percentages, but are always in relation to the viewport. Think rem.

An interesting Sass-based bunch of mixins for responsive grids. Looks promising.

Villard diagram: dividing a segment in n parts in a medieval, yet late-modern, fashion.

Note the trick for creating quick baseline/vertical grids in Photoshop.

The Less repsonsive layout framework is getting mature.

Create background images for grid alignment via a simple URL API.

A javascript tool that allows you to configure and show a baseline grid on a webpage by holding "G". Handy.

You set width/column combos and it shows gutter width options that DO divide evenly. Much better than fishing around for a working combo with a calculator.

The BBC walks through the process of re-designing their website's visual system. This is a perfect example of how designing for the web is about creating flexible systems.

Khoi Vinh gives a visual overview of the steps he went through to design his Basic Maths WordPress theme.

Gapless vertical stacking of boxes through jQuery. The only thing you have to specify is width. Think spacecollective gallery.

A classy grid calculator

Crazy simple and gorgeous grid-based design.

Intricate and minimal grid-based design. Very evocative of Muller Brockmann. A clever play with layering elements (foreground and background playfully intertwine) causes the page to pop, keeping it from looking flat.

A slick, configurable grid generator with standard ad widths to drag in and design around.

Compiling resources for grid-based design. Nice Brockmann-esque site, too.

Lots-o-links from Smashing mag.

Creative grid-based post layout, with Ajax loading. Fun.

Alistapart debuts a new positioning technique that shines with grid-based layout (even in liquid %-based layouts). The ease of absolute positioning paired with the flexibility of in-flow elements.

Grid system. 960px.

Sick of running numbers for CSS grid layouts? Me too. This does it for you. Plug in what you want, it does the math.

A nice little javascript to help you develop on a grid.