Middleware is a "glue" software that pools together various computing resources to create the Grid. It allows users to securely access the integrated computing and storage resources of in a way similar to accessing an enourmous virtual computer. EGEE develops and deploys a middleware distribution called gLite (pronounced "gee-lite"). gLite is a result of collaborative efforts of more than 80 people in 12 different academic and industrial research centers as part of the EGEE Project, gLite provides a framework for building grid applications tapping into the power of distributed computing and storage resources across the Internet.

The gLite middleware stack provides the user both with foundation level and higher level services. Foundation level services ensure security, resource access and systems to monitor grid activity. These provide the basis for a consistent and dependable production infrastructure. Higher level services provided by gLite include job management, data catalogues and data replication, providing applications with the tools to build end-to-end solutions. Other third party projects complete a rich ecosystem built on the gLite foundation services.

Constellation Technologies will be developing cloud computing solutions for the next generation of Internet based on gLite.