I have ported/forked some MX Linux packages for use in antiX-17. They are in the repos if users want to test them out.
apt-notifier
An applet that indicates when updates are available
For antiX, after installation you need to add this line (near the bottom) of ~/.desktop-session startup file
apt-notifier &
repo-manager
GUI for setting antiX and Debian repos
antix-viewer
A small utility program that displays a URL in a new window