Several experiments are performing searches for dark matter in the Galaxy in the form of weakly interacting massive particles (WIMPs). A major search technique is to look for secondary particles originating from the annihilation of pairs of WIMPs at various locations in the Galaxy. The nature of the experiment depends on the species of secondary particle searched for. This paper outlines the motivation for such searches and describes the present experimental status. Existing data from searches from positron, anti-proton, gamma-ray and neutrino detectors will be presented, together with details of future experiments under construction.