org-mode is great and I use it to write longer, unorganized sorts of things. It was amazing to have a place I could keep track of my time to the minute, extend if I wanted to do basically anything, etc. I missed the visualized nature, however, as I found the visual feedback to be imperative to my taste.
calfw can integrate with org. I mostly use the integration as a way point for gcal sync, but even if the integration isn't exactly what you want, adding a new source to calfw is very easy
