Your question is kind of like saying "I just found out about Home Depot, and I want to know the list of commonly used tools." So someone might say "carpet knife, pipe wrench, screwdriver, floor sander, paint brush and lawn mower are commonly used", but that's not very helpful to you if you're interested in doing electrical work.

Tell us more about what you do with your programming and we might be able to point you at some helpful modules.