This question is meant to serve as a trouble-free gallery of puzzles deemed noteworthy by anyone.
Whoever wants to contribute, feel free to post a minimalistic answer, something like the following, and add comments that link to any puzzles for whatever reasons.
Puzzle gallery comments from [you]
(Nobody else comment here, please, instead post your own Puzzle gallery comments from [you] answer like this.)
These answers are expected to remain unedited once posted.   Rather, this gallery is meant to function purely through comments under such posts.
Revisions, being mere additions and deletions of comments, will not interrupt Meta Puzzling’s list of active questions.
Over-generosity will be tucked away automatically by “show _ more comments.”
Each answer is expected to have comments only from its poster. If a poster becomes frustrated by interloping comments, they can delete the existing post and start a new answer with just their own comments.
The resulting gallery is self-curated, post by poster, and requires no consensus or bickering.
We can find out about otherwise-overlooked puzzles from users whose interests overlap.
Self-promotion is possible without a sense of guilt or a pretense of objectivity.
(Incidental benefit: Any poster can test-format comments ultimately meant elsewhere, as nobody will be notified of temporary comments under a poster’s own post here.)