1. Eclipse Ditto: Eclipse Ditto is an open-source project that provides a framework for creating and managing digital twins. It offers features for modeling devices and their digital representations, as well as providing APIs for interacting with the digital twins. Eclipse Ditto is highly customizable and extensible, making it suitable for various use cases. Download link: Eclipse Ditto

2. ThingWorx Navigate: ThingWorx Navigate, part of the ThingWorx platform, offers a freemium version that allows for the creation and management of digital twins. It provides tools for creating 3D visualizations, capturing and managing IoT data, and integrating with other IoT platforms. ThingWorx Navigate is user-friendly and comes with comprehensive documentation and support. Download link: ThingWorx Navigate

3. DTM Digital Twin SDK: The DTM (Digital Twin Modeling) Digital Twin SDK is an open-source framework for building digital twins. It provides a set of tools and libraries for modeling assets, sensors, and environments to create and manage digital twins. It offers support for various data formats and protocols, making it suitable for diverse digital twin applications. Download link: DTM Digital Twin SDK

These tools offer a range of capabilities for creating and managing digital twins, catering to different use cases and requirements.