I'm hyper-controlling about the websites and games my students play in school. While there is time for free choice on the computer, I really want the children playing purposeful games that fit in with our curriculum.
Here are some great games that go along with classifying and sorting.
Zoe's Pet Shelter
Oscar's Trash Collection
...one more thing! Here is a label I gave a few students after working on sorting. I used it as more of a vocabulary practice, but it would be a great summarizing strategy! Put the labels in their math journals to draw a picture of how they can sort.