Grid computing and pervasive computing have rapidly emerged and affirmed respectively as the paradigm for high performance computing and the paradigm for user-friendly computing. The conjunction of such paradigms are now generating a new one, the Pervasive Grid Computing, which aims at extending classic grids with characteristics of pervasive computing like spontaneous and transparent integration of mobile devices, context-awareness, pro-activity, and so on.

In this paper, we present a software infrastructure for integrating mobile devices as active resources in a grid. In particular, it has been developed a service able to dynamically distribute and execute user?s tasks on a grid of mobile and fixed devices. Mobile devices participate to the grid in a way completely transparent to their owners, hence the computational power is given without any configuration operation and in a reliable way. As well, users willing of executing their applications directly submit their code without caring of choosing and allocating resources of the grid.