Software reuse can help the science community by reducing software development timescales, reducing costs, and contributing to the dissemination of knowledge and expertise. This Software Reuse Portal has been established by the Reuse Working Group to bring together a collection of resources that will facilitate reuse within the Earth science community. Over time, we will be researching a variety of resources in the Earth and space science reuse communities. Our long-term goal is to establish a knowledge sharing community for software reuse in Earth science and, possibly, to establish a "marketplace" for reusable software development artifacts.