Gnucoop and ChangeLab, for their respective fields of competence, have been accompanying the OSCs in strengthening their capabilities in the technological-informatics and methodological-design field, have devised an instrument that can help CSOs in the process of measuring the impact of their own organization. This tool can be considered as an accompanying path to the definition of their own Theory of Change (ToC) and a web platform that can use it to measure impact of the organization. Knowledge And Learning Management System (KALMS) is a web platform for the management of monitoring, evaluation and learning (ME&L) activities of a non-profit organisation. The platform is based on a data-oriented approach, exploiting in a structured way the production, the organization of the data and the capitalization of knowledge.