  Possible dark matter candidates are reviewed as well as indirect search
methods based on annihilation or decay channels of these particles. Neutralino
is presently the best particle candidate and its annihilation produces high
energy neutrinos, antiprotons, positrons and gamma-rays. To date, only upper
limits on neutrino fluxes from the center of the Earth or the Sun, were
established by different experiments. Antiprotons detected by the BESS
collaboration, if issued from the follow up hadronization of the annihilation
process, exclude neutralino masses higher than 100 GeV. The EGRET gamma-ray
residual emission seen at high galactic latitudes above 1 GeV could be
explained by neutralino annihilations if: i) the dark matter profile is "cored"
and ii) the neutralino mass is < 50 GeV. Sterile neutrinos in the keV mass
range are a possible candidate to constitute warm dark matter. These particles
may provide an adequate free streaming mass able to solve "some" difficulties
present in the cold dark matter scenario at small scales and could also explain
the natal kick of pulsars. MeV particles, dubbed "light" dark matter, proposed
to explain the extended 511 keV line emission from the galactic center will
also be discussed.
