C++

Tool	Category(s)	Developer(s)	License(s)
HELICS	Co-Simulation Frameworks	NREL , Pacific Northwest National Lab , Lawrence Livermore National Laboratory	BSD 3-Clause License
DPSim	Dynamics Simulation , Power Flow	RWTH Aachen University	Mozilla Public License 2.0
CIM++	Data Structures	RWTH Aachen University	Mozilla Public License 2.0
Dynaωo	Dynamics Simulation	RTE	Mozilla Public License 2.0
ExaGO	Power Flow	Pacific Northwest National Lab	BSD 3-Clause License
VILLASframework	Co-Simulation Frameworks	RWTH Aachen University	GNU General Public License v3.0
DistAIX	Distribution Modeling	RWTH Aachen University	GNU General Public License v3.0
PVWatts Calculator	Device Modeling	NREL	BSD 3-Clause License
System Advisor Model	Device Modeling	NREL	BSD 3-Clause License
Antares	Resource Adequacy Modeling , Production Cost Modeling	RTE	GNU General Public License v3.0
PowSyBl		LF Energy	Mozilla Public License 2.0