• Github: Tech Interview Handbook lists out curated content to help people ace their next technical interview.
• Online book: Problem Solving with Algorithms and Data Structures and Blog: BaseCS are two wonderful free online tutorial that walks through the actual content.
• Cheatsheet: data structure cheatsheet is a quick reference of common data structure and algorithm's runtime that might come in handy.

The notebook mostly includes a short note about the topic at hand, the implementation, and links to external resources that contains more thorough material.

• Basic Data Structures (Stacks, Queues, LinkedLists). [nbviewer]
• Recursion (Dynamic Programming). [nbviewer]
• Search and Sorting (Binary Search, Hash Tables, Merge/Quick Sort). [nbviewer]
• Trees (Breadth/Depth First Search Tree Traversal, Binary Search Tree, Heap). [nbviewer]