After the second year of Fermi orbiting, the number of galactic sources associated with Pulsar Wind Nebulae (PWNe) and SuperNova Remnants (SNRs) has largely increased. For all these sources multi-wavelenghts spectral energy
distributions have been investigated and information about acceleration mechanisms and interaction sites have been collected and studied. The GeV-TeV connection of some recently detected sources will be presented and different interpretation of the observed spectra will be discussed