Libraries

Question

Does anyone know any good sources for codes that can be called into other programs

Answer 1

Do you have a target language in mind (what is it)?

Answer 2

Python has a built-in library called "The Python Standard Library" DevExpress Universal is arguably the best in my opinion.

Answer 3

I'm messing about with both python and java
I want to write some programs related to physics and maths but thought I'd cut some work out by calling code from libraries ( read something about the idea in C)
Joe