LabVIEW Community Edition is NI’s graphical programming environment, free for personal non-commercial projects: data acquisition, instruments, Arduino.
oemof.solph builds LP and MILP optimisation problems for energy systems in Python: CHP, storage, heat pumps and renewables, from one building to a region.
PyPSA is an open Python framework for optimising power and energy systems: economic dispatch, capacity expansion, storage and sector coupling. Who it suits.
DIALux evo designs and calculates lighting for rooms, buildings, outdoor areas and streets with real luminaire data. What is free, what is paid, who it suits.
pvlib python is an open library for modelling PV systems: sun position, irradiance on tilted surfaces, cell temperature, losses and output. For PV engineers.
MATPOWER is an open toolbox for power flow and optimal power flow, widely used in research and teaching. It runs in MATLAB or free GNU Octave, with test cases.
VeraGrid, formerly GridCal, is open power grid planning software with a GUI: load flow, short circuit, OPF, contingency analysis and dynamic simulation.
pandapower is an open Python library for grid analysis: load flow, optimal power flow, short circuit and state estimation, with validated element models.
FEMM is free Windows finite element software for 2D problems: low-frequency magnetics, electrostatics, heat flow and current flow. For motors and coils.
TINA-TI is a free SPICE simulator from Texas Instruments with models of TI analogue and power parts. Meant for design work — its terms forbid educational use.
Qorvo’s QSPICE is a fast mixed-signal SPICE simulator with digital blocks in C++ and Verilog. Free, including for commercial use, but it is not open source.
OpenPLC is an open IEC 61131-3 platform: ladder, FBD and ST, a built-in simulator and deployment to Raspberry Pi and Arduino. What is free and what is paid.
