  Context. Close-in giant extrasolar planets (''Hot Jupiters'') are believed to
be strong emitters in the decametric radio range.
  Aims. We present the expected characteristics of the low-frequency
magnetospheric radio emission of all currently known extrasolar planets,
including the maximum emission frequency and the expected radio flux. We also
discuss the escape of exoplanetary radio emission from the vicinity of its
source, which imposes additional constraints on detectability.
  Methods. We compare the different predictions obtained with all four existing
analytical models for all currently known exoplanets. We also take care to use
realistic values for all input parameters.
  Results. The four different models for planetary radio emission lead to very
different results. The largest fluxes are found for the magnetic energy model,
followed by the CME model and the kinetic energy model (for which our results
are found to be much less optimistic than those of previous studies). The
unipolar interaction model does not predict any observable emission for the
present exoplanet census. We also give estimates for the planetary magnetic
dipole moment of all currently known extrasolar planets, which will be useful
for other studies.
  Conclusions. Our results show that observations of exoplanetary radio
emission are feasible, but that the number of promising targets is not very
high. The catalog of targets will be particularly useful for current and future
radio observation campaigns (e.g. with the VLA, GMRT, UTR-2 and with LOFAR).
