Slate
A fast, simple text editor that opens files of any size
Slate is a fast, simple text editor for Windows and Linux, including the Raspberry Pi: a better Notepad that opens files of any size. An 800 MB JSON file or log shows up in a fraction of a second and stays smooth to scroll and search, because Slate only reads and draws the part you're looking at.
The everyday editing is all there: tabs that come back with your unsaved changes, find and replace with regular expressions, syntax colors for 52 languages, line tools, bookmarks and printing....