Write your own!
That's what I did somewhere around 2000 or 2001, some years before I could program my way out of a wet paper bag or had a technical career. I'll probably still be using a variant of the same system[0] long after I have fully obsolesced and retired to the proverbial van down by the river to wait quietly for death.
A simple toolchain that you understand and can maintain in its entirety turns out to be very useful for a long-term writing project, and blogging occupies a sweet spot where you can leverage common tools and libraries (for tasks like templating, lightweight markup, and publishing) without sacrificing much of your understanding of the system as a whole. You may not need much more than some blobs of Markdown and a Makefile.