Figures, captions, and tables are the ones I need to know.
PS: To quote:
Extension: implicit_figures
An image occurring by itself in a paragraph will be rendered as a figure with a caption. The image’s alt text will be used as the caption.
Extension: table_captions
A caption may optionally be provided with all 4 kinds of tables. A caption is a paragraph beginning with the string Table: (or just :), which will be stripped off. It may appear either before or after the table.
And so on.
+-----------+-----------+-----------+
| label a | label b | label c |
+-----------+-----------+-----------+
| r1f1 | r1f2 | r1f3 |
+-----------+-----------+-----------+
| r2f1 | r2f2 | r2f3 |
+-----------+-----------+-----------+