I like the idea of mind mapping: a graphical, non-linear representation of connected stuff appeals to me (perhaps I’ve been looking at biochemical pathways for too long?). As an on-again/off-again google search, I’ve stumbled across several implementations of this concept:
- gjots2 (my favourite outliner atm)
- gnome-think (outliner)
- notecase (outliner)
See a more comprehensive article.
Update: also see this article in the Linux Gazette, the discerning geek’s literature of choice., for a breakdown of available tools.