I have pay for editors which i like but obviously I don't install them when on a machine for a few days, on a contract or something. When I need to install an editor for a while, I have used pspad, crimson, context and they're all pretty nice editors.
I have used context quite a lot recently as it is quick and has a lot of useful feature (text snippets, favorites, column select, little things like this). It doesn't seem to play well with unicode, so if i need unicode i get pspad