  Jets are ubiquitous in the Universe. They are collimated outflows whose
origin is associated to an accretion disc and a central object, and can be very
powerful non-thermal emitters. Jets form in active galactic nuclei, gamma-ray
bursts, microquasars, and young stellar objects. Galactic jets emitting
non-thermal emission are typically associated to microquasars, although the
jets of massive young stellar objects are also non-thermal sources. The
production of non-thermal radiation, in particular radio synchrotron emission,
is a clear indication that particle acceleration is taking place in the source,
which hints to the generation of photons even at high energies. In this work,
we will discuss the emitting sites in, or related to, microquasar jets, and
briefly comment on the possibility of high-energy emission in jets from young
stellar objects.
