What are the best books to learn algorithms and data structures? Are there any good blogs/posts on these? Which books explain these concepts in a simpler way?

Here is a list of online books about Algorithms and Data Structures in various formats available for free :

Advances in Evolutionary Algorithms
by Witold Kosinski, 2008, 284 pages, 40MB, PDF

Advances in Genetic Programming, Vol. 3
edited by L. Spector, W.B. Langdon, U. O’Reilly, P.J. Angeline, 1999, PDF

Algorithmic Algebra
by Bhubaneswar Mishra, 1993, 425 pages, 2.3MB, PDF

Algorithmic Graph Theory
by David Joyner, Minh Van Nguyen, Nathann Cohen, 2010, 105 pages, 760KB, PDF

Algorithmic Information Theory
by Gregory. J. Chaitin, 2003, 236 pages, 0.9MB, PDF

Algorithmic Mathematics
by Leonard Soicher, Franco Vivaldi, 2004, 94 pages, 0.5MB, PDF/PS

Algorithmic Number Theory
by J.P. Buhler, P. Stevenhagen, 2008, 662 pages, PDF

Algorithms
by Robert Sedgewick, Kevin Wayne, 2011

Algorithms
by S. Dasgupta, C. H. Papadimitriou, and U. V. Vazirani, 2006, 336 pages, 2MB, PDF

Algorithms and Data Structures
by Niklaus Wirth, 1985, 179 pages, 1.2MB, PDF

Algorithms and Data Structures for External Memory
by Jeffrey Scott Vitter, 2008, 191 pages, 1.1MB, PDF

Algorithms and Data Structures: The Basic Toolbox
by K. Mehlhorn, P. Sanders, 2008, PDF

Algorithms for Clustering Data
by Anil K. Jain, Richard C. Dubes, 1988, 334 pages, 39MB, PDF

Algorithms for Modular Elliptic Curves
by J. E. Cremona, 1992, 351 pages, PDF

Algorithms: Fundamental Techniques
by Macneil Shonle, Matthew Wilson, Martin Krischik, 2006, 68 pages, 1.2MB, PDF

Average Case Analysis of Algorithms on Sequences
by Wojciech Szpankowski, 2000, PS

Behavior of Algorithms
by Daniel Spielman, 2002, PDF

Categories, Types, and Structures
by Andrea Asperti, Giuseppe Longo, 1991, 300 pages, PDF

Clever Algorithms: Nature-Inspired Programming Recipes
by Jason Brownlee, 2011, 436 pages, 3MB, PDF

Combinatorial Algorithms
by Albert Nijenhuis, Herbert S. Wilf, 1978, 316 pages, 5.5MB, PDF

Combinatorial Algorithms
by Jeff Erickson, 2003, 197 pages, 1.9MB, PDF

Computational and Algorithmic Linear Algebra and n-Dimensional Geometry
by Katta G. Murty, 2001, 554 pages, PDF

Computational Geometry: Methods and Applications
by Jianer Chen, 1996, 227 pages, 1.3MB, PDF

Data Structures
by Dave Mount, 2001, 123 pages, 730 KB, PDF

Data Structures and Algorithm Analysis
by Clifford A. Shaffer, 2012, 613 pp, 2.6MB, PDF

Data Structures and Algorithms
by John Morris, 1998

Design and Analysis of Computer Algorithms
by David M. Mount, 2003, 135 pages, 0.8MB, PDF

The Design of Approximation Algorithms
by D. P. Williamson, D. B. Shmoys, 2010, 496 pages, 2.3MB, PDF

Efficient Algorithms for Sorting and Synchronization
by Andrew Tridgell, 1999, 115 pages, 410KB, PDF

Essentials of Metaheuristics
by Sean Luke, 2009, 233 pages, 5.3MB, PDF

Evolutionary Algorithms
edited by Eisuke Kita, 2011, 584 pages, 30MB, PDF

Evolved to Win
by Moshe Sipper, 2011, 193 pp, 1.9MB, PDF

From Algorithms to Z-Scores: Probabilistic and Statistical Modeling in Computer Science
by Norm Matloff, 2013, 486 pp, 3.4MB, PDF

Genetic Algorithms and Evolutionary Computation
by Adam Marczyk, 2004

Genetic Programming: New Approaches and Successful Applications
edited by Sebastian Ventura, 2012, 284 pp, 6.5MB, PDF

Greedy Algorithms
by Witold Bednorz, 2008, 586 pages, 47MB, PDF

Introduction to Algorithms
by Erik Demaine, Srinivas Devadas, Ronald Rivest, 2008, PDF

Knapsack Problems: Algorithms and Computer Implementations
by Silvano Martello, Paolo Toth, 1990, 308 pages, 23MB, PDF

Lecture Notes on Algorithm Analysis and Computational Complexity
by Ian Parberry, 119 pages, 1.9MB, PDF

Lecture Notes on Bucket Algorithms
by Luc Devroye, 1986, 142 pages, 4MB, PDF

Mathematics for Algorithm and Systems Analysis
by Edward A. Bender, S. Gill Williamson, 2005, 256 pages, PDF

Modern Computer Arithmetic
by Richard P. Brent, Paul Zimmermann, 2009, 239 pages, 1.9MB, PDF

Planning Algorithms
by Steven M. LaValle, 2006, 842 pages, 13.2MB, PDF

Problem Solving with Algorithms and Data Structures Using Python
by Brad Miller, David Ranum, 2011

Problems on Algorithms, 2nd edition
by Ian Parberry, William Gasarch, 2002, 268 pages, 2.4MB, PDF

Quantum Algorithms
by Michele Mosca, 2008, 71 pages, PDF/PS

Quantum algorithms for algebraic problems
by Andrew M. Childs, Wim van Dam, 2008, 52 pages, PDF/PS

Randomized Algorithms
by Wolfgang Merkle, 2001, 46 pp, 370KB, PDF

Search Algorithms and Applications
edited by Nashat Mansour, 2011, 494 pages, 18MB, PDF

Sequential and Parallel Sorting Algorithms
by H. W. Lang, 2000

Sorting and Searching Algorithms: A Cookbook
by Thomas Niemann, 2008, 36 pages, 150KB, PDF

Topics in Theoretical Computer Science: An Algorithmist’s Toolkit
by Jonathan Kelner, 2009, PDF