Biodalliance is a fast, interactive, genome visualization tool that's easy to embed in web pages and applications. It supports integration of data from a wide variety of sources, and can load data directly from popular genomics file formats including bigWig, BAM, and VCF. This means you can build a fully-featured genome browser, such as the example on this page, using only a standard web server and a directory full of files — no databases or server-side support code are needed.
2 February Dalliance 0.11 is released with VCF support, a new track editor, and many other improvements. See the release notes for details.