Recent advances made in synthetic applications of organotin reagents are reviewed with emphasis on (1) Sn-Hbond reactions and resulting cyclizations, (2) Sn-Metal reagents, (3) allylstannanes and carbonyl additions, (4) metal exchange of organotin reagents involving Pd (0) catalysis, and (5) Sn-hetero atom bond reactivities, distannoxane catalyses, and Sn-S bond reactions.