#8.Khan Academy

Khan Academy is a non-profit educational organization to provide "a free, world-class education for anyone, anywhere”. The organization produces micro lectures in the form of YouTube videos. It features practice problems and tools for educators. All resources are available for free to anyone around the world.

#9.Lumosity

Lumosity is an online brain training and neuroscience research company based in San Francisco, California. Lumosity offers a brain training program consisting of more than 40 games in the areas of memory, attention, flexibility, speed of processing, and problem solving. Lumosity’s mobile app has been downloaded more than 10 million times and is often at the top of the Apple iTunes Store’s educational-gaming category.

#10.Recipe Puppy

Recipe Puppy is an ingredient based recipe search engine built by Kris Brower. It can search for recipes by ingredients and keywords concurrently, and it allows you to specify ingredients you don't want in the recipe. The results are ordered by the number of matching ingredient, and then by the number of ingredients in the recipe.

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