To enhance the practical applicability of topology optimizationTopology optimization results in engineering and architecture, it is highly desirable to generate multiple solutions to a given problem that are not only structurally efficient but also geometrically distinct. This chapter presents various techniques we have developed in recent years to achieve diverse and competitive designsDesigndiverse and competitive without altering actual load and support conditionsSupportcondition. These techniques include changing optimization parametersOptimizationparameter within the optimization algorithmOptimizationalgorithm or across the design domainDesigndomain, penalizingPenalizing existing designsDesignexisting or specific regions of the design domain, introducing randomness into the optimization processOptimizationprocess, and explicitly controlling the structural complexityStructuralcomplexity.