This chapter presents a set of technologies developed with the goal to improve the learning and practice of Cued Speech (CS). They are based on 3D graphics and are covering the entire end-to-end content chain: production, transmission and visualization. Starting from the requirements of an online system for CS, the research and development path took into account real-time constraints, personalization, user acceptability and equally important, the easiness and feasibility of the deployment. The original components of the system include 3D graphics and animation encoders, streaming servers and visualization engines and are validated in two applications: a web service for text to animation conversion and a chat service supporting two or more users