"The GPL-licensed Pivot blogging software stands out among
blogging applications because it requires no database, no extra
libraries, and minimal installation effort. While it's still in an
early stage of development, its flexabilty and the ease with which
it can be set up make it ideal for those new to maintaining their
own blogging Web sites.
"To use Pivot, you need a server that's running PHP 4.1.0 or
higher. Unlike WordPress or Movable Type, Pivot requires no MySQL
database; it stores most of its data within XML files. Pivot also
strives to use no extra libraries so as to be available and usable
by as many people as possible..."