libwbxml is a library to encode and decode WBXML (WAP BinaryXML). It was migrated to GitHub. The pages on Sourceforge are only available for historical reasons as it was used in the past for development and releasing.
The WBXML Library is a C library for handling WBXML (Wireless BinaryXML) documents. It consists of a WBXML Parser (with a SAX like interface), a generic WBXML Encoder, and an internal representation of the document (WBXMLTree).