You can find all the Modules that are sold on the Roll20 Market Place here: <a href="https://marketplace.roll20.net/browse/search/?keyw" rel="nofollow">https://marketplace.roll20.net/browse/search/?keyw</a>... Any module that you acquire from another source is playable on Roll20, so you can pick up whatever 4e module you like, set up the maps and such, and get together your group of friends to play. You won't find any discussion of Running 4e Modules on Roll20's forums, outside mechanical details of using the interface or features in conjunction with them as there is this stipulation in the Roll20 Community Code of Conduct : The Roll20 Forums exist to discuss topics directly related to the use of the Roll20 program. Anything that more fittingly could be discussed on another website SHOULD be discussed there. Here are some good places to discuss the running of DnD modules: /r/rpg /r/dnd /r/dndnext /r/ADND /r/LFG