Once again, Devon Technologies has put out a minor release that many, many vendors would have tagged as "major" and charged for an upgrade -- this time, adding a new note type, Markdown capability, and Mavericks tagging.
I bought this package shortly before 2.0 came out, when the developer was offering a 2.0 upgrade for any buyers of 1.x after that date.
That was five years ago; the 2.0 release was in 2008. And several times now, the Devon people have put out some pretty big new features (especially on the Pro Office package, which I don't have), without upping the major release number.
If you're going to spend anything more than $10 or $20 on a piece of organizational/research software, it's nice to know that that "planned obsolescence" is not the developer's strategy.
Aside from that, it's just really good software. I tried a bunch of these products that make information capture and organization easy. Yojimbo's capture is probably easier, but not by very much if you use DevonThink's Sorter. DevonThink can also capture from a lot of different places in your workflow -- browser extension, print-to-PDF dialogue, global Inbox in your Finder, all mean you can capture any time the thought comes to you.
But none of the other information managers out there provide you with anything like the kinds of tools you get from DevonThink for whipping your information into shape once you've captured it. Seriously, there's just no contest. There's an AI for suggesting cross-references and filing/tagging locations, you can auto-file all the stuff in your inbox if you've learned to trust that AI, you can annotate and edit PDFs, HTML, and Rich Text...
It's just flat sick, is what it is.
And, since it's basically morally wrong to keep a guy's stuff in a proprietary database with no way out (and there are information managers that do this), you can export to plain old files-and-folders that mimic your groups/tags, and navigate them through the Finder.