There are two major categories in this forum:
1. JDK1.0.2 simulations (1996-2001) : There are about 100 physics related simulations I have created before I knew about EJS.
2. Easy Java Simulations (2001- ): Here are all the simulations created with EJS.
So you should be able to know if the simulation was created with EJS, just check for the name of the category!