Platform for cloud application software

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for determining distributing web applications. One of the methods includes associating at least one user account and at least one developer account with an application execution system, the at least one user account including user data. A web application is transferred from the developer account into a shared area accessible by the at least one user account. A request is received to associate the web application with the user account from the shared area. The web application is associated with the user account, wherein the web application is configured to access the user data of the user account, and wherein access to the user data of the user account is based on authentication associated with the user account. The installed web application is executed using the user data to create user results based on the user data.