xili-postinpost Widget provides a toolkit to insert post(s) in widgets spaces in webpage. The displayed post(s) are resulting of queries like those in WP loop but not interfere with main WP loop. Widget contains also conditional syntax.
Example as here in dev.xiligroup website (display a post associated to a category)
Example with display of recent custom posts and condition.
(as here on top left sidebar under the cloud of xilifunctions tags)
Another example with all settings visible :