Quiet Puzzle Garden is a small collection of logic puzzles and gentle games that run entirely in your web browser. Every title loads from this site with no install step and no sign-in.
The games keep their own progress in your browser storage so you can return to a level later. The site itself collects no personal data, and pages aimed at children carry no advertising and no analytics of any kind.
Pick a game from the home page, read the how-to-play article if you are new, and enjoy a quiet moment of thought.