The gLite distribution is an integrated set of components designed to enable resource sharing. In other words, this is middleware for building a grid.

The gLite middleware is produced by the EGEE project. In addition to code developed within the project, the gLite distribution pulls together contributions from many other projects, including LCG and VDT. The distribution model is to construct different services ('node-types') from these components and then ensure easy installation and configuration on the chosen platforms (currently Scientific Linux versions 4 and 5, and also Debian 4 for the WNs).

gLite middleware is currently deployed on hundreds of sites as part of the EGEE project and enables global science in a number of disciplines, notably serving the LCG project.

You might also want to have a look at the latest technical presentations.