Aziridines, the nitrogen counterparts of epoxides, are among the most challenging and intriguing heterocycles in organic chemistry, since they not only represent the endpoints of several total syntheses as common scaffolds in natural products, but also act as crucial precursors of complex molecules. The present review provides a brief overview of aziridine derivatives as well as the authors' choice of published papers that highlight recent enhancements concerning asymmetric organocatalytic strategies involved in aziridination reactions.