OSGi is a wrapper above the Java Virtual Machine that embraces two concepts: component approach and service-oriented programming. The component approach enables a Java run-time to host several concurrent applications, while the service-oriented programming paradigm allows the decomposition of applications into independent units that are dynamically bound at runtime. Combining component and service-oriented programming greatly simplifies the implementation of highly adaptive, constantly evolving applications. This, in turn, is an ideal match to the requirements and constraints of ambient intelligence computing, such as adaptation to changes associated with context evolution. OSGi particularly fits ambient requirements and constraints by absorbing and adapting to changes associated with context evolution. However, OSGi needs to be finely tuned in order to integrate ambient specific issues. We mainly focus on Zero-configuration architecture, Multi-provider framework and Limited resource requirements. During the last decade we studied many OSGi improvement that should be taken into account when building OSGi-based gateways. This paper summarizes our INRIA Amazones teamwork on extending OSGi specifications and implementations to cope with ambient concerns. This paper references our OSGi extension publications divided by three main concerns: management, isolation and security.