Sublime is a massive improvement in my opinion, and cross platform. It's not free** but you can use a personal license at work and on multiple machines. It's one of the few text editors with a plug-in system that can reliably open 100mb+ files and auto reload on file updates (without crashing constantly).
** it's sort of free, the trial period is unlimited. It just gives "activate me" popups every dozen file saves or something.