This page gathers information about implementation efforts and interest, along with interoperability testing plans. We undertook a bounty program in 2010 that facilitated the creation of test cases. Interop testing activities are now centered on the OSIS wiki, in the "UMA1" namespace area. We are currently filling in the interop participants, their solutions (potentially more than one for each participant), testable features of the UMA specs, and specific feature tests, with the wiki to be populated with interop testing results by the actual participants.
Maciej Machulak is the UMA group's implementation coordinator. Key implementations are noted below.
This Java implementation includes an UMA/j framework and sample applications. See the SMART blog. The OAuth portion, originally named leeloo, has been contributed to Apache Amber. Part the SMART project involves development of set of open-source Python libraries, called Puma, for UMA-enabling web apps to become UMA hosts and requesters.
Fraunhofer AISEC project
This Java implementation has been contributed to Apache Amber. Developer documentation is available. Update from the team as of 9 Jul 2012: "UMA client, AM, and Host are running now within AISEC domain and will be accessible from the outside after receiving the security clearance from our network team".
This wide-ranging open-source project has an UMA component. Its main use case is enterprise usage, so its user interface component may not be as fully developed as other implementations.