Varnish is a state-of-the-art, high-performance HTTP accelerator. It uses the advanced features in Linux 2.6, FreeBSD 6/7 and Solaris 10 to achieve its high performance. Some of the features include * A modern design * VCL - a very flexible configuration language * Load balancing with health checking of backends * Partial support for ESI * URL rewriting * Graceful handling of "dead" backends * more features... Varnish is free software and is licenced under a modified BSD licence. Please read the introduction to get started with Varnish. See what people blog about varnish