Free Knowledge Portal
Stable urls that showcase a Wikidata item's sitelinks, and related items.

Try https://tools.wmflabs.org/portal/Q100 (or any other Wikidata item id) to see this tool in action.
Or try https://tools.wmflabs.org/portal/Q100/fr (or any other language) to see it in another language.
Or use a page title and site code: https://tools.wmflabs.org/portal/?title=Boston&site=enwiki.