The Generic Grid-Grid (3G) Bridge is an open-source core job bridging component between different grid infrastructures. Its development started in 2008 within the and projects. The aim was to create a generic bridge component that can be used in different grid interoperability scenarios. The 3G Bridge used within the EDGeS project that provides the core component of the Service Grid - Desktop Grid interoperability solution. 3G Bridge helps to connect user communities of different grid systems. For example, communities working on parameter sweep problems (physics, biologists, ...) and using service grid infrastructures can migrate their applications to the more adequate desktop grid platform using the 3G Bridge technology, resulting in an accelerated research.