These are programs for processing the English Wiktionary dump.
all-headers generates data on the frequency of all headers by header level.
filter-headers generates a list of pages with the headers that they have. It is designed to be used with a large list of excluded headers, so it only allocates enough memory for four unique headers per page.
find-templates generates a list of all instances of a given template with the titles of the pages on which they were found.
find-multiple-templates is like find-templates, only it lists multiple templates.
All of them require Expat and commander, and all-headers, filter-headers, and find-multiple-templates also require Hat-Trie.