pyxmldsig is a Python module to create and verify XML Digital Signatures (XML-DSig). This is a simple interface to the PyXMLSec library, aiming to provide a more pythonic API suitable for Python applications. See http://www.decalage.info/python/pyxmldsig

Pure Go implementation of XML Digital Signatures

XML::Sig - A Perl toolkit to help sign and verify XML Digital Signatures.

Java implementation example of xml digital signature https://docs.oracle.com/javase/8/docs/technotes/guides/security/xmldsig/XMLDigitalSignature.html

An example project how to create digitally signed xml in java (detached signature)

(WIP) Pure Rust xml signing library