Hidden sources of egg are numerous. Suspects include any baked good, bread, cake or cookie, egg substitutes (which might contain some egg), many candies and confections, nougat, marzipan, mints, ice cream, and marshmallows.
Note that most commercial pastas, dried or fresh, even if egg-free, might be processed using equipment used for pastas containing egg. Be aware that egg-containing pasta often appears in other products, such as soups. If in doubt, avoid these pastas.
Any prepared or restaurant dish that is breaded is likely to use egg as a binder.
Crackers are often brushed with egg before baking.
Frothy toppings on specialty coffees may include egg.