In the last two decades, sustainable urban environments have been predominant, meaning that knowledge production has accompanied this growth. The objective of this study is to present multiple projects for sustainable urban management applied in cities, based on the original Strategic Digital City (SDC) concept, model, and project. The research methodology included an SDC systematic literature review, highlighting the sustainability and respective action research of 11 doctoral theses and multiple projects. The obtained results highlight a set of published multiple projects that form a practical analytical cycle of sustainable and interconnected urban processes through the original SDC framework proposition, SDC, which can be applied in different cities in different countries. The innovations present in the SDC multiple projects propose a theoretical–empirical debate in the interdisciplinary areas of urban management, municipal administration, and sustainable public innovation, with a focus on local government and democracy studies, prioritizing sustainable strategies in cities and not just technologies. The conclusion reiterates that the original multiple projects, created and applied in different cities, present an interdisciplinary advance in sustainable urban management areas and public administration, focused on sustainable urban studies.