Uses of Killing and Killing-Yano Tensors

Authors: Ulf Lindström and Özgür Sarıoğlu Preprint Number: UUITP-07/22 In this contribution we have collected some facts about Killing and Killing-Yano tensors that we feel are of general interest for researchers working on problems that rely on differential geometry. We also include some of our recent studies pertaining to currents, charges and (super)invariants for particles and tensionless strings.