...The Efficient XML Interchange (EXI) format is a very compact representation for the Extensible Markup Language (XML) Information Set that is intended to simultaneously optimize performance and the utilization of computational resources.
Besides the EXI library EXIficient provides a command-line interface (CLI, see com.siemens.ct.exi.cmd.EXIficientCMD) and a graphical user interface (GUI, see http://exificient.sourceforge.net/exificient.jnlp)
MixDEM a web based ETL tools meant for Web integration, Data transformation and Mashup edition. It include MixDEM ETL Engine created using ZEND Framework, and MixDEM GUI Editor an AJAX IDE that enable developers to quickly and easily create applications.