Wonster Words is a fun activity that focuses on letter sounds. There are two free packs by default and a "Daily Words' free pack that can be downloaded. Even though it is slightly limited, it is just the perfect amount for the Halloween season!
This app puts an interesting twist on the idea of color by numbers. Students can be challenged to solve an addition or subtraction problem to figure out how to paint the picture instead of just the classic number recognition.
Finn & Friends Mysteries is an interactive book for elementary students. It features the ability for students to read on their own, be read too, or be set to auto play (would be similar to a video then).
Carving a pumpkin is a favorite Halloween activity, but often can not be done in the classroom due to the mess and you know, the knives. Heck, I don't trust myself with knives, so I just stick to this awesome app that let's me have all the fun without the mess and loss of fingers!