Other software to learn

Hi, I am taking Java in a technical college and was
wondering if I should download some other software to practice
using java with. I mean right now in school we just seemed to be
focused on writing programs on a windows platform, and I KNOW that
when I get out in the real world there will be some OTHER software
used in conjunction with other than just the programming language!
What should I get in my tool kit? What would be some programs I need
to know my way around in that my school doesn't have.
(We just write programs in note-pad or blue J) for windows! This doesen't seem sufficient!