+1 for org-mode.
Org-mode files are tree-structured, so anything you can structure as a tree should work well with org-mode. The navigation controls work nicely: expanding/collapsing, reordering, searching within subtrees.
Org-mode files are tree-structured, so anything you can structure as a tree should work well with org-mode. The navigation controls work nicely: expanding/collapsing, reordering, searching within subtrees.
To any interested readers, I'd watch Carsten Dominik's (the original Org-Mode auhtor) Google Tech Talk on the topic. It's good to see it explained from the creator's perspective, imo.