OpenEng (Open Science for Engineering or Open Engine) offers system science solutions to reveal and harness the complexies and organization of materials and structures in nature and engineering. High-fidelity databases are provided together with powerful apps designed for scientific research and industrial applications. Showcases, documents and tutorials in the aerospace and energy industries are hosted to guide the usage of data and tools. Resources are open to the public with data and codes in CC-BY and MIT licenses to promote the development of open science and data sharing, specifically in the field of engineering.