An interesting program I’ve been using for the last few weeks (months? When did I install that thing, anyway?) is the Zim Desktop Wiki, which works pretty much like a cross between a notepad program and a, well, wiki. Making new pages is as simple as linking to ones that don’t exist yet. Linking to a page can be as easy as placing your cursor within a word, pressing ctrl-L, and hitting “enter” twice. (Though usually it takes a little more than that.)
I love it. It’s a little awkward at first, but once you learn the keyboard shortcuts it’s fairly smooth sailing. I used it to keep track of my wanderings through the SubNet Exploration Experience and soon had an in-depth, cross-referenced database of everything I’d found in there.
It even supports tags, which I love in ways that are probably illegal in some states.
I found it in the Ubuntu software repositories when I was looking for pretty much exactly that kind of program, but it also has Mac & even Windows versions for people who use, you know, those sorts of operating systems.
As yet, it has not tried to conquer the Earth. That I’ve noticed, at least.