Plastic pollution is a significant global issue impacting ecosystems, livelihoods, and human health, prompting international efforts to create a legally binding instrument known as the Plastic Treaty. To address the scale and nature of plastic pollution and implement potential solutions, various stakeholders have developed numerous approaches, tools, methods, models, and information sources. These resources, including guidance documents, academic research, technical reports, decision support software, and publicly available data sets, cover a wide range of issues from assessing plastic pollution flows to evaluating policy solutions and financing. This report aims to inform national governments about key tools and toolkits specifically designed to help plan actions at the national level to combat plastic pollution.