Restaurants: https://www.mekorhabracha.org/kosher-restaurants.html

Other resources (kosher places, synagogues, etc): https://keystone-k.org/

Also, great synagogue: https://www.southphiladelphiashtiebel.org/

For everything Jewish Philly, no holds barred: https://jewishphilly.org/

Finding kosher specialty items in center city: https://www.mekorhabracha.org/kosher-groceries.html