As a software developer, this is one of the questions that is often asked, and one of a big source of confusion. In the debate about the difference between frameworks, libraries, packages and modules, what does each one of them represent.
Is the smallest piece of software. A module is a set of methods or functions ready to be used somewhere else.
Is a collection of modules. This may sound funny, but usually what a package does, is gather a number of modules holding in general the same functional purpose. Making it easier to include all the related modules at once.
Well library at it's core, is a collections of packages. It's purpose is to offer a set of functionalities ready to use without worrying about the subsequent packages. So a library is what you include when you want to add some functionality to your code. It does not force any coding style on you either.
It's a set of libraries. But this time, the framework does not just offer functionalities, but it also provides an architecture for the development work. In other words you don't include a framework. You integrate you code into it. He is the wire frame of the project. That's why a framework forces its coding style on you.
I hope that this quick summary was enjoyable !