Alright, this isn't specifically about fonts, but is about font sizes and readability on screen in general. The focus of this is getting things to the appropriate size so that it is easily readable in a number of IDE's. Here's what I've found for the following IDE's and tools that I commonly use.
First things first, regardless of the operating system one needs to get some basic resizing and magnification sorted out for the particular operating system. This generally means setting the resolution to a particular default and also the increase in magnification.