[lcall]

After trying different things over the years, I wrote this:

http://onemodel.org (yes I plan to move to https sometime)

You can think of it something like a personal wiki + emacs org-mode, using postgres, but with a much larger vision than today's features, including sharing (linking/copying) between instances, and computability of the info. The most current code is in github (AGPL). Comments/questions very welcome, preferably via the mailing list; be patient if my answers are slow. Announcements list is low-volume.

Edit: it can store files, but isn't especially smooth about it (yet). For personal notes of all kinds, it is the most efficient, effective, flexible thing I know of.

Edit: the FAQs link to a discussion comparing it with emacs org-mode and others.

Edit: it has built-in text search, and some finicky but very functional import/export.