Bars

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

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