Galaxy allows you to do analyses you cannot do anywhere else without the need to install or download anything. You can analyze multiple alignments, compare genomic annotations, profile metagenomic samples and much much more... We provide a public Galaxy instance at http://usegalaxy.org where you can do all this with nothing more than a web browser.
Galaxy is an easy-to-use, open-source, scalable framework for tool and data integration. Tool developers, stop wasting time writing interfaces and get your tools used by biologists! Labs, installing your own local instance of Galaxy is easy, and allows you to use your own dedicated computational resources and custom tools.