Globally, the need for territorial entities to have a territorial information system in which the existing real estate and its physical and legal characteristics are registered is identified. This system would facilitate the administration and management of the resources of the same and thus allow the decision-making of different administrative entities according to the various purposes required. For this reason, free software plays a fundamental role in land administration due to its versatility in being studied, modified, distributed, and improved. It is for this reason that this article exposes a vision of the concept of free software and provides a description of the tools that intervene and facilitate land administration from a flow that starts from the management of databases with the creation of a model that fits the process of cadastral formation in Colombian territory, then describes the customization of forms for field acquisition by mobile device using the model described above. It also details the automation processes for the edition and validation of the information from desktop tools. Finally, it concludes with free tools’ role in land administration and how they contribute to the definition of an agile and efficient multipurpose cadastre.