The Library is more than Books
The Public Library has saved me hundreds over the last couple years. Not only do they have books, but I can borrow dozens of other things. The obvious ones are video games, movies, and magazines. But if your library is like some that I’ve been in, you might be able to check out museum passes, sports equipment, board games… even sewing machines.
Edit: There are tons of great additional recommendations in the comments. Some of my favorites mentioned are telescopes, musical instruments, language learning software, academic journals, and video hardware.