Ankidown started as an attempt to allow for collaborative input on Anki decks, with markdown/text being easier to jointly edit and update than Anki’s existing data schema. Notes can be written in a text editor of choice, which adhere to a particular format. Then, a template of that format is used to parse in the fields of that note to create the Anki note.
Together this allows for the quick import of semi-structured information.
The source is available here, or it can be installed with the code