"Slides from de Mobo is a very good app that allows you to remotely control your presentations using your iOS or Android device. Slides works best with presentations on Google Drive, Prezi, Slideshare, Scribd, Speakerdeck and Issuu. To be able to use the app, you will need to have both your phone and your computer under the same WiFi network."
Splashtop Classroom is a great tool that allows teachers control and share lessons and presentations on their desktop with all students in class. Students will be able to see and follow everything you do on your desktop. With the recent updates, both teachers and students now can use whiteboard tools to add annotations and drawings to lesson content right from their own devices.
"Magic Actions for YouTube is a good Chrome app to use on YouTube to enhance your watching experience. It provides a wide variety of excellent features that allow you to make the best of your YouTube. For instance, the AutoHD feature lets you play all YouTube videos in HD. Cinema Mode shades the whole page and makes you feel like you were in a movie theatre. And with one click you can switch to browse YouTube in black and white."
Pixiclip is an excellent free web tool that provides users with a canvas where they can draw, sketch, narrate, and record their creations. This is an ideal whiteboard tool that you can use with your students to record explanations of processes or to create tutorials for flipped classroom materials.