Description: DiaGrid (www.diagrid.org) is a science gateway to help science community share resources, applications and collaborate with each other. It is free for users to sign up and access computing resources instantly. Based on the HUBzero Platform for Scientific Collaborations, DiaGrid supports self-service – users may upload their own content – including scientific applications and tools, tutorials, courses, publications, etc., and share them with others. Users can launch simulations and analyze results with an ordinary browser without downloading, compiling, or installing any software. Tool developers can follow an automated process to create, install, test, and publish tools on DiaGrid.