International Network for Democratic Economic Planning
If you want to exchange ideas and network with others internationally, we recommend INDEP (quoted from their website):
The International Network for Democratic Economic Planning (INDEP), is an international network of workers, students, researchers, and activists, who share the common goal of advancing a post-capitalist economic system based on democratic economic planning.
We believe it is necessary to go beyond only criticizing and opposing capitalism to bring the goal of post-capitalism into focus by envisaging the institutions of a new social order and by carefully working towards its realization today. INDEP strives to catalyze that process.
It is not the role of INDEP to endorse a single proposal for a post-capitalist society but to facilitate the rich research, debate, and experimentation on that question. However, as a Network, we believe that humanity can only overcome the chronic dysfunction of capitalism, including the urgent ecological and climate crises, by transforming society to a system based on democratic economic planning, which we advocate as the alternative to both command and market economies.