The guide for Confluence and its marketplace first provides an introduction to Confluence's offer: presentation of the different licensing modes, pricing policy, presentation of the marketplace and its contribution to native coverage in terms of uses, etc. Over 50 applications are analysed and compared according to the following categories: Formatting, Theming, Graphs and diagrams, Data tables, Document management, Metadata Forms, workflows, Integrations. This guide explains the concepts offered by the apps, compares them when necessary, in order to make the right choice. It gives a price index relative to the market for each plug-in as well. The 2021 Confluence guide by Spectrum Groupe helps you enrich your Confluence instance by making the right choices and discovering the ecosystem's capabilities to deploy a powerful collaborative software.