MicrocircuitDB provides an accessible location for storing and efficiently retrieving realistic computational models of brain microcircuits and networks. The focus is on microcircuits that are based on experimentally demonstrated properties of neurons and their connectivity. MicrocircuitDB is tightly coupled with ModelDB, containing models of those neurons, and with NeuronDB, which contains the distribution of membrane properties within neuron types. Models can be coded in any language for any environment. Model code can be viewed before downloading and browsers can be set to auto-launch the models. Help