Yep a private repo in GitHub goes a loooong way. With git you can be offline, dump whatever comes at any time. Markup syntax is remarkable in its simplicity but how much you can get out of it.

GitHub UI for on the move web committing is also pretty well done.

For a lot of things in life, you want to have simple interface yet sophisticated functionality. It’s incredibly hard to achieve that balance and so many software products screw up that balance.