This paper presents a middleware platform we designed in order to allow the deployment of component-based software applications on mobile devices (such as laptops or personal digital assistants) capable of ad hoc communication. This platform makes it possible to disseminate components based on peer-to-peer interactions between neighboring devices, without relying on any kind of infrastructure network. It implements a cooperative deployment scheme. Each device runs a deployment manager, which maintains a local component repository, and which strives to fill this repository with software components it is missing in order to satisfy the deployment requests expressed by the user. To achieve this goal the deployment manager continuously interacts in the background with peer managers located on neighboring devices, providing its neighbors with copies of software components it owns locally, while obtaining itself from these neighbors copies of the components it is looking for.