No idea - a quick skim, and the first version was the one I liked most. It would search Thunderbird emails too with a plugin, was instantaneous, and for a little while was a huge productivity boon.
With a bit of thought, the later versions did retain some local search, but made it clunky and awkward. I forget quite how, only that I liked it less and less. Course before too long it was discontinued entirely. Odd really as it, to me, is the obvious use of my computer for my web activity...
Recoll will index an MS-Word document stored as an attachment to an e-mail message inside a Thunderbird folder archived in a Zip file (and more...). It will also help you search for it with a friendly and powerful interface, and let you open a copy of a PDF at the right page with two clicks. There is little that will remain hidden on your disk.
Baloo and Milou on the KDE desktop is often decried for performance reasons, but is quite powerful.
I like how it can perform full-text search in my documents (pdf, etc). It also searches your e-mails if you use Kmail (and contacts, events, etc if you use other KDE PIM tools).
I only wish it was a bit less eager to extract files on underpowered laptops, and it would be nice if it could OCR pdfs and tag images (facial recognition, etc).
With a bit of thought, the later versions did retain some local search, but made it clunky and awkward. I forget quite how, only that I liked it less and less. Course before too long it was discontinued entirely. Odd really as it, to me, is the obvious use of my computer for my web activity...
Here's the original press release and a couple of screen shots: http://googlepress.blogspot.com/2004/10/google-announces-des...