agoraws is a lightweight REST web service client that was originally derived from the assisted living research project at UIUC. The original goal was to create a web service client that runs on cell phone platform which have limited processor and memory available.
The same set of API works on both J2SE and J2ME platform.
wsrf4j2me is an implementation of the Web Services Resource Framework (WSRF) for the Java 2 Microedition (J2ME). It is built on top of the ksoap2 API.
It has been developed with the intent to allow direct access to Grid Web Services.
Apache Mirae is an open source implementation of JSR 172, which provides a capability of accessing web services to the mobile platform. This project provides a stub compiler that creates all the code J2ME applications need to execute simple programmatic calls to an existing Web service.