HxD 2.5 was released with many feature enhancements and bug fixes.
Here are the change log and the download.
GregC/DigicoolThings published a disassembler plugin on GitHub for MC6800, MC6809, 6502 and related CPUs.
The updated plugin framework can be found, here, as usual:
https://github.com/maelh/hxd-plugin-framework
If you like it, please star / fork it, so it becomes more well known.
Donations are welcome if you want to say thanks.