Scalable Vector Graphics (SVG) is an XML markup language for describing two-dimensional vector graphics, both static and animated. It is an open standard created by the World Wide Web Consortium, which is also responsible for standards like HTML and XHTML.
Want to know more ? Visit World Wide Web Consortium (W3C) or Wikipedia.
SVG Example
It looks pretty similar like flash animation at first look but it's not the same thing. You can view the source code here. You're still using Internet Explorer or you can't see anything ? Change to FREE + FASTEST Opera web browser now ! If you're unaware about "Opera Eliminates Ad Banner and Licensing Fee" thing, read here. The samples are borrowed from Opera and other website.
Native Support
Below are some browsers that supports SVG natively , without the need of external plug-in:
Opera web browser (since 8.0 Beta 3)
Mozilla Firefox web browser (since 1.5 Beta 1)
As well as KDE' Konqueror, Apple's Safari web browser etc.