algoexpert.io
Unknown
AlgoExpert is an online platform for learning data structures and algorithms, offering a curated set of coding problems with video explanations, detailed write-ups, and an in-browser IDE to practice and prepare for technical interviews.
More resources on Data Structures & Algorithms
Algorithms Part I
This course covers the essential information that every serious programmer needs to know about algorithms and data structures, with emphasis on applications and scientific performance analysis of Java implementations. Part I covers elementary data structures, sorting, and searching algorithms. Part II focuses on graph- and string-processing algorithms. All the features of this course are available for free. People who are interested in digging deeper into the content may wish to obtain the textbook Algorithms, Fourth Edition (upon which the course is based) or visit the website algs4.cs.princeton.edu for a wealth of additional material. This course does not offer a certificate upon completion.
CP-Algo
Free competitive programming algorithms reference
takeUforward
Striver's free DSA sheet and problems
Visualgo
Interactive visualizations of algorithms
GeeksforGeeks
Free DSA tutorials, articles, and practice
LeetCode
Free DSA practice problems and patterns