• Every book by Robert Sedgewick
• The Algorithm Design Manual
• Introduction to Algorithms
• Notes on Data Structures and Programming Techniques (CPSC 223, Spring 2015) - fantastic notes by Professor James Aspnes, the Director of Undergraduate Studies of the Yale Computer Science Department, with interesting homework assignments that make you apply various data structures/methods to solve various problems. C language used. Free

Robert Sedgewick - Algorithms in Java, contains a lot of good material on Algorithms.

Also have a look at this resource: en.wikibooks.org/wiki/Data_Structures