In Sweet Miniatures : The Art of Making Bite-Size Desserts by Flo Braker, you will find popular favorites including:
Individual Lemon Meringue Tarts
Shortbread Cameos
Viennese Triangles
Krumkake
Pistachio Petit Fours
Neapolitan Wedges
Lebkuchen
Miniature chewy Panforte di Siena
Crispy Florentine Squares
Tangy Shreveshire Tarts
Little sweet somethings--Candied Almond Clusters, Golden Caramels, and Toffee Butter Crunch and much much more.
You might also want to flip through Baking with Julia where Flo Braker displays some petit four recipes:
Miniature Florentine Squares
Glazed Mini-Rounds
Madeleines and Lady Fingers (you can make them bite-size)
At last, in Claudia Fleming's book The Last Course: The Desserts of Gramercy Tavern, you will find Chestnut-honey madeleines, Earl Grey Chocolate Truffles. There's also the famous chocolate-caramel tart (she describes it as a highly sophisticated Rolo candy) and you certainly can make miniature ones. Don't forget to sprinkle with Fleur de Sel just before serving.
You will also find some ideas in Professional Pastry Chef, 3rd ed.