Description: HackerRank is an online platform that provides coding challenges and contests to help developers improve their programming skills. It offers practice problems across various languages and computer science domains like algorithms, machine learning, and security.
Type: software
Description: SQL Fiddle is an online SQL database testing tool that allows users to easily create, share, test, and run SQL queries. It supports various databases like MySQL, PostgreSQL, Oracle, SQL Server, etc.
Type: software