Below is a list of new Markup Elements in HTML 5

Tag Description
<article> Specifies independent,self-contained content, could be a news-article, blog post...
<aside> For content aside from the content it is placed in. The aside content should be related to surrounding content
<bdi> For text that should not be bound to the text-direction of its parent elements
<command> A button, or a radio button or checkbox
<details> For describing details about a document
<figure> For grouping a section of stand alone content, could be a video
<figcaption> The caption of the figure section
<footer> For a footer of a document or section
<header> For an introduction of a document or section
<hgroup> For a section of headings
<mark> For text that should be highlighted
<meter> For a measurement, used only if the max and min values are known
<nav> For a section of navigation
<progress> The state of a work in progress
<ruby> For ruby annotation
<rt> For explanation of the ruby annotation
<rp> What to show browsers that don't support ruby element
<section> For a section in a document. Such as chapters, Headers, Footers
<time> For defining time or date, or both
<wbr> Word break



source: W3C