The NSF-supported Neuroscience Gateway (NSG) http://www.nsgportal.org allows computational neuroscientists to run parallel simulations, free of charge, on supercomputers using tools like GENESIS, NEURON, NEST, Brian, and PyNN. Other tools will be added based on users' requests. NSG provides a simple web-based interface that makes it quick and easy to create an account, upload model code, run simulations, and get back results. To get started, go to http://www.nsgportal.org , click on the "Go to the NSG Portal" button, and follow the instructions in the sentence: "New users who are interested in getting an account should fill out the form and email it to nsghelp@sdsc.edu" For any questions or suggestions related to the NSG portal, please contact us at nsghelp@sdsc.edu The NSG developers team