Citizens’ observatories are web-based platforms designed to increase citizens’ participation and knowledge of their surrounding environment by collecting different formats of data and information. This chapter presents the design and development of a standard set of customizable software artefacts for a citizen observatory for geohazards that support the functional needs of the citizen observatories and have been made available for use by other Atlantic Interreg initiatives via an online catalogue. Both AGEO observatory and mobile apps require only local action from the citizens that can have regional, national, and global impact. These tools are complemented by an easy-to-use open-source toolkit for mapping ground motion via Interferometry of Synthetic Aperture Radar (EZ-InSAR). These software tools developed within AGEO have prioritised ease of use and immediate accessibility to enable citizens to monitor geohazards and thereby potentially contribute to local or regional risk management.