Rotoscoping
www.keepvid.com - site where you can download youtube videoes as editable files to use in applications such as Imovie.
www.giphy.com - Site that allows for simple animation to be created and edited quickly.
photoshop - The latest versions of Adobe's flagship program, Photoshop, is fully equipment to make animations with you. Use the timeline window. The 3 square window layout is easier for beginning, but you'll switch over when you need to use sound.
Audacity - A free recording and mixing program. We will probably not get to sound this semester as our time is limited, but just know about this.