A slab serif font by Tavmjong Bah, based on the Vera fonts. Unlike traditional slab serif fonts, DejaVu has contrast between thick and thin strokes. The bowls are slightly square, and the large x-height means it remains readable at smaller sizes.
DejaVu tests well across browsers, though there are some letterspacing issues in Safari on Windows XP.
The DejaVu Serif family consists of 8 fonts (various weights and styles). All are available for free download at fontsquirrel.com.