The following Obsidian plugins come pre-installed in the sample vault:
Dataview
From Dataview’s site:
Dataview is a live index and query engine over your personal knowledge base. You can add metadata to your notes and query them with the Dataview Query Language to list, filter, sort or group your data. Dataview keeps your queries always up to date and makes data aggregation a breeze.
Dataview Publisher
Output from the Dataview plugin isn’t written in the raw markdown file, so Quartz does not pick it up for publishing. This plugin facilitates writing the final dataview query output to the markdown automatically so it can be published using Quartz.
Find orphaned files and broken links
Searches your vault for files without incoming links or links without target files to help sanitize your vault.