Top 3 short-circuit open source projects

Native, "direct" Python bindings and misc tools for OpenDSS (EPRI Distribution System Simulator). Based on CFFI, DSS C-API and custom patches, aiming for full COM API-level compatibility on Windows, Linux and MacOS.

A Graphical User Interface for the open source pandapower load flow program. [ I was so inexperienced when I started this, but maybe we can try again]

PSP-UFU (Power Systems Platform of Federal University of Uberlândia) is a cross-platform, multilingual, Free and Open-Source Software with advanced GUI features and CAD tools for electrical power system studies.