learnist is a site which curates paid and unpaid content for learning and because there are ratings for the boards you can see what others like to learn. The paid content is part of the premium concept of the site. You can search for what you want to learn or you can use the topics in the left sidebar to navigate the site. learnist is another example of a site which demonstrates people like to share their knowledge but there are also plenty of people who want to learn. That concept of learning 24/7 365 days a year. There is a good review of learnist on teachthought.