Apache Tuscany project is focused on the development and innovation for three key technologies: Service Component Arcitecture (SCA), Service Data Object (SDO) and Data Access Service . There are standards available for SCA and SDO at OASIS.
There are two subprojects under Service Component Architecture which provide implementation for an infrastructure to support SCA in Java and native languages. Each of these infrastructures provide plug points for other lanaguage implementations and bindings.
There are two subprojects under Service Data Object(SDO) which provide implementation of SDO runtime in Java and in native languages.
There are multiple projects in progress under Data Access Service(DAS) to enable data access to a variety of end data sources.