Free (standard conforming) library to model mechanical (1D/3D), electrical (analog, digital, machines), magnetic, thermal, fluid, control systems and hierarchical state machines. Also numerical functions and functions for strings, files and streams are included.

Free library for interfacing hardware drivers to Modelica models. There is support for joysticks, keyboards, UDP, TCP/IP, LCM, MQTT, shared memory, AD/DA converters, serial port and other devices.

📄 Modelica library for data I/O of CSV, INI, JSON, MATLAB MAT, SSV, TIR, Excel XLS/XLSX and XML files

Free (standard conform) library that is intended to model electrical power systems at different levels of detail both in transient and steady-state mode.

The DLR Thermofluid Stream Library

Free library for modelling and simulation of waste water treatment plants.

The ExternalMedia library provides a framework for interfacing external codes computing fluid properties to Modelica.Media-compatible component models.

DroneLibrary: Multi-Domain Drone Modeling in Modelica with 3D visualization and FMU export configuration

Free library that contains models with different complexity for simulating of electric energy storages like batteries (single cells as well as stacks) interacting with loads, battery management systems, loads and charging devices.

Free (standard conforming) library for interface definitions and architectures for vehicle system modeling

Solar thermal power/fuel station performance simulation and optimisation using Modelica. Read a paper about our project: https://is.gd/solth

A Modelica library for photovoltaic system and power converter design

HanserModelica is a Modelica open source educational library on electrical engineering with a particaular focus on polyphase electrical machines

Modelica library for the simulation of photo voltaic cells and modules

Free library for modeling according to the principles of system dynamics of J. Forrester.

Dynamic modeling for business, economics, and ecology using the system dynamics approach

Free library providing different representations of linear, time invariant differential and difference equation systems, as well as typical operations on these system descriptions.

The OpenHPL is an open-source hydropower library that consists of hydropower unit models and is modelled using Modelica.

GeoJSON to Modelica Translator that is focused on district energy system design and analysis.

A semantics compliance suite for the Modelica language