There is always that "other" category.

Drop Box - store and share files.

YouTube for Schools

Mind Mapping with SpiderScribe

A Simple Timer

Ad free YouTube Videos.

Short URLs - Two of the best!

Video tutorials with Screen Toaster and Jing! OR Screen Capture for still images.

Present Me - Presentations with slides and Audio/Video

Timeline generator - create simple timelines.

Dipity - for timelines, flipbooks, digital storytelling.

Hot Potatoes quiz and crossword generator.

MyStudiyo generate multimedia quizzes.

Download YouTube to play off line.

Wordle - generate word clouds.

Google Wonder Wheel - visual mind map of search results

Scoop It to gather media on your favorite topic.