Index of Yiddish Recipes - Literally an index. Categories and recipes are well broken down for ease of navigation. Basic Kreplach - The Jewish Community Network is a wealth of information. Recipes available here are from Phillip Goldwaser and include not only Kreplach, but links to his Potato and Noodle Kugel, Challah, Chicken Soup, and Chicken Salad recipes. Jewish Food - Links to recipes and articles on Jewish and Kosher foods.
Some links are redundant.
However, it's worth the visit for the recipes, which include holiday and everyday items. Holidays include Hanukkah, Purim, and Passover. You can go to the archives, which are broken down by date range and read through the submissions. You will have to sift through the discussions to get to the actual recipes. Most of the recipes you will find here are of a Mediterranean nature.