Description: Stack Exchange is a network of question-and-answer websites on topics in diverse fields, from software programming to cooking to photography. Users post questions which can be answered by other members of the community.
Type: software
Description: Udemy is an online learning platform that offers over 180,000 courses in topics like development, business, design, marketing, IT and software, personal development, photography, and more. Courses are created by expert instructors and can be accessed on demand.
Type: software
Pricing: Paid