Optiwave Systems’ (Ottawa, ON, Canada) OptiFDTD 6.0 optical design software for passive and nonlinear photonic components brings Finite-Difference Time-Domain modeling and simulation to photonics and bio-photonics engineers. The software provides a simulation environment for designing photonic crystals, components, and nano-devices, and for performing medical R&D in nonlinear systems. New features include the ability to assign point sources in a design environment and facilitate symmetric or periodic layouts using the Periodic Boundary Condition. Version 6.0 also allows users to create custom scripts and execute time-saving operations.