Course contents block
Course contents block produces a list of all visible topic/week in the course. Clicking at one of these links will display that particular week or topic.
If the section name is defined, it is used in the course contents. Otherwise, the block automatically extracts a suitable title for every week or topic from the section summary. If you start summary with a heading (H1, H2, H3, etc), it will use such heading text. If your summary starts with a bold text, it will be used as a section title. If the summary consists of several paragraphs, the first one will be used. Technically spoken, the plain text content of the first non-empty HTML DOM node from the section summary is used as the summary title. If no suitable title can be populated, the current course format's default is used.
The block has been written and is currently maintained by David Mudrak.
See the page at Moodle wiki for more details.