There are 2 repositories under enex-files topic.
Yarle - The ultimate converter of Evernote notes to Markdown
Backup & export all Evernote notes and notebooks
Import Evernote ENEX files to Notion
This is an unofficial packaged version of Evernote (same as the Windows distribution version)
GoogleTask2Evernote is a tiny node.js script that converts a GoogleTasks.json exported from Google Tasks (using the Google Takeout) to the Evernote Export format `*.enex`.
Code to backup Evernote notes. Extracts text/html, attached files and notebook structure.
Parsing Evernote enex format with Kindle highlights export from Readwise.