This website is a community of makers that shares information on projects they've made so that other people can follow in their footsteps, using step-by-step detailed instructions. Its founders came from the MIT Media Lab and nowadays more than 100,000 projects are listed. These include a modest number of interactive art projects with downloadable software. A couple of examples are listed below.
Hackster claims to be "the world’s fastest growing developer community for learning, programming, and building hardware." In some respects it's like a geeky version of Instructables. It provides detailed instructions on how to build more than 12,000 projects a proportion of which target beginners. Many of the projects are in fields such as home automation, robots, drones and so on but a small number are interactive art creations. An example is given below: