This deliverable, D3.3 – Report on the Software Tool Integration with Selected Platforms, documents the work carried out in Task T3.3 of the InterSTORE project, which focuses on the integration procedure and mapping of interoperability software tools with diverse Energy Management Systems (EMS) across multiple partner platforms. Building on the developments from WP2, where the IEEE 2030.5-based client/server library and the Legacy Protocol Converter (LPC) were designed and validated, this task translates those solutions into real-world deployments at the platform level. The objective is to enable seamless communication between diverse Distributed Energy Resources (DERs) and EMS platforms, overcoming the limitations of proprietary or legacy protocols while ensuring compliance with modern interoperability standards. The work reported here demonstrates the flexibility, scalability, and adaptability of the interoperability tools developed in InterSTORE. By enabling reliable data exchange and control across diverse platforms and technologies, these solutions pave the way for advanced grid services such as flexibility provision, aggregation of distributed assets, and seamless integration into energy markets. Furthermore, the standard integration procedure and interoperability mapping developed in T3.3 provide a replicable framework for different use cases within the whole project, future deployments, supporting the broader adoption of interoperable smart grid solutions.