Allrecipes.com: Bar Cookies
   A collection of recipes for chocolate, fruit, no-bake, nuts, and oat bar cookies.
   http://allrecipes.com/recipes/baking/cookies/bar-cookies/main.aspx

Anthony's Peseta Bars
   Detailed recipe for these Italian cookies.
   http://www.spaghettisauceandmeatballs.com/pesetas.html

Brownies and Bars from Life-Tips
   Recipes such as milk chocolate chunk brownies, easy graham squares, and maple oatmeal cookie squares.
   http://cooking.lifetips.com/TipSC.asp__Q__id__E__40

CDKitchen: Bars and Squares
   Large collection of recipes including lemon bars, crispy treats, butterscotch squares, and a selection of chocolate and fruit bars as well.
   http://www.cdkitchen.com/recipes/cat/27/0.shtml

Cooking for Engineers: Lemon Bars
   Provides step by step instructions with photos and reader comments.
   http://www.cookingforengineers.com/article.php?id=33

CooksRecipes.com: Bar Cookies
   A collection of bar cookie recipes listed by category.
   http://www.cooksrecipes.com/category/bar.html

Filled bars and Squares Recipes
   Large index of recipes including cinnamon apple, apricot, caramel pecan, and date squares, as well as cream cheese marble brownies, and chewy maple granola bars.
   http://www.betterbaking.com/recipeCategory.php?category_id=2&pagerItemsPerPageCount=10&pagerFirstItemInd=20

Recipe Goldmine: Bars, Squares and Slices
   Large index of recipes featuring Creme de Menthe Bars, Frosted Orange Spice Bars, Raspberry Tea Squares, and Kiwifruit Squares.
   http://www.recipegoldmine.com/cookbar/cookbar.html

RecipeSource: Bar Cookie Recipes
   Index of numerous diverse bar recipes.
   http://www.recipesource.com/desserts/cookies/bars/