Sublime Text is an excellent programmer's text editor that I use daily. It has support for tons of languages (and variants on those), automatic indentation, bracket completion, quote completion, a "memory" feature (knows variables you've typed), extensions support, and even compiling features. It has a full portable version, with nothing cut out. I'd highly recommend it, as the trial is unlimited (and the license is cheap for a tool this high quality - only $60).

Just about every pop song for the past... eternity... has used the same pattern: I, V, vi, IV. It's hilarious how bad it's getting. For instance, look at the preview of Coldplay's "The Scientist" on MusicNotes. The original key is F Major, so we'll work off of that. We start off with a Dm chord, thusly iv (minor sixth). Transition into Bb Major, so we get IV (major fourth). Then down to F, so I, and finally to C, so V (major fifth). They just shifted the pattern two chords over.

And it was called Gattaca.