Is there a (prefearable free) module for just listing up the latest items created? I would like to place a simple list of latest news in a single box by itself for easy access on all pages..

Try creating a new module - mod K2 Content, set its position, and set the filter to most recent, set the number of items to show and also what you want to show in the display

Aha! That was all I needed. Thank you!

Some tiny trouble fixing the styling on it, but I'll manage :P