This is a rather short python 2 script that searches through the XML file of an exported keepassx database and searches for a password hash. Might be useful in case one of your account's passwords is leaked by hackers, but you don't know what account it belongs to.
This binary requires the defusedxml version 0.4.1 python egg from pypi. You can probably easily make it work with other readily available xml parsers for python.
Licensed under GPLv3. Have fun.