I can second Islanders, it's a lovely and relaxing game. After playing a level to completion I'd find myself just gazing at it for half an hour or more just imagining life and society on the island. Any game that can so playfully stimulate my imagination is an instant recommendation.
My only complaint when last I played was that they didn't let you save a previous island after moving on to the next level, which makes progression somewhat bittersweet.