LIXA (LIbre XA) is a Transaction Manager implementing the distributed transaction processing "XA specification" and "TX (transaction demarcation) specification" according to the X/Open CAE Specification. LIXA is a Transaction Manager but it's not a Transaction Monitor; this is the distinguishing feature of the project. LIXA technology enables every application container, like a Web server or a shell, to become an XA compliant application server. The client/server architecture of LIXA allows many application containers to share a single LIXA (state) server; this is ideal when horizontal scalability is a must and many identical application containers must refer to a single transactional environment. Performance, scalability, and high availability are key features of the project. LIXA can be used with the C, C++, and PHP programming languages.