In this article, we describe a Service Creation Environment (SCE) that allows for protocol- and technology-independent development, deployment, and maintenance of interactive, menu-driven mobile services for cellular networks. The presented SCE eases the maintenance of mobile services, in particular by means of versioning and access right management. The SCE even allows third-party content providers to deploy services on their own by remotely accessing the SCE residing at a Mobile Network Operator (MNO). The presented SCE is based on an open source Content Management System and currently supports maintenance of HTML-based service descriptions.