hnb installed, since it uses the commandline interface of `hnb` program.
It is roughly based on the `otl` plugin but uses `mktemp` to create temporary files since `hnb` has no "quiet" switch and otherwise the hnb version number and other as well as the output file name always would be in the output itself.
+
+For now it's available for download at <http://noone.org/hnb/hnb.pm>
+
+TODO: Make a switch to allow both HTML export routines of hnb (`export_html` and `export_htmlcss`) to be used.