Sharing a few extremely practical niche websites! They can be used for finding resources, side jobs, slacking off, renting houses, installing systems, and more:

1. Resource Monkey Resource Library ()
Known as an all-in-one resource site, it has study materials, movies and animations, wallpapers and image collections, courses and tutorials, software tools—all categorized clearly, making it very easy to find what you're looking for.
2. Jiamu Says ()