Description: GeeksforGeeks is a computer science portal with a huge variety of well-written and explained computer science and programming articles, quizzes and interview questions. It covers topics like data structures, algorithms, operating systems, languages like C++ and Java, and more.
Type: software
Description: OpenStreetMap is a free, open-source, crowd-sourced map of the world. Volunteers collect map data using GPS devices, aerial imagery, local knowledge, and other free sources to create and update the map database.
Type: software
Pricing: Open Source