PICWave

SOA modelling (link with Harold)
Mode-locked laser
Quarter-wavelength shifted DFB laser + modulator
SG-DBR tuneable laser
Silicon-on-insulator (SOI) hybrid tapered laser
Mode hopping in a Fabry-Perot laser

Efficient optical circuit simulator featuring a Time-Domain Travelling Wave (TDTW) optical model
Circuits may contain both passive and active components, and have a near-arbitrary topology. 
Models both planar waveguide and single mode fibre geometries for waveguide cross-sections - integrated high performance fully vectorial 2D+z Finite Difference mode-solver, and Single Mode Fibre Solver.
Supports multiple transverse modes, e.g. for polarisation diversity studies.
Wide variety of instruments - measuring optical power, wavelength, current, carrier density, threshold and more.
Wide variety of analysis tools - plotting optical and power spectra, eye diagrams, RIN spectra, dispersion spectra, LI curve fitting etc.
Signal editor for defining optical and electrical input signals: optical power and wavelength, or alternatively, complex optical amplitude; and electrical current or voltage. An optical amplitude signal can be completely arbitrary and imported from file (e.g. generated by MATLAB). 
Material database system
Extensive command-line interface, support for scripting with Python and MATLAB 
Extensive support of multi-core and multi-CPU computers to speed up your simulations