Sure, one is connmapperl. It is a server/client application where the server is a GUI map of the world that shows all the various clients collected IP established connections via geoip lookup (local). It stores everything in sqlite db and has a bunch of config/filtering options; http://superkuh.com/connmapperl.html Technically a fork of X11 connmap I made because I coulnd't get it to run on my old X11, but with many, many more features (like offline whois from raw RIR dumps, the db, the hilbert mapping, the replays of connection history, etc).

Another one is memgaze, a program to vizualize linux process virtual memory spaces as RGB images and explore them using various binary visualization and sonification tools. Ie, you can just click a hilbert map of all processes then in the new window click around inside the image of that particular process' virtual ram and then listen to it interpreted as an 8bit wav, or find an extract images, for example. Or search for strings, run digraph analysis, etc. http://superkuh.com/memgaze-page.html

Or feeed.pl, my very quick and low resource usage feed reader for 1000+ feeds written in Perl/Gtk2 that is text only (no html, no images, etc). It is really handy for loading .opml files and finding and fixing broken feeds using the heuteristics I hard coded in to find feed urls. http://superkuh.com/blog/2025-09-13-2.html

These are a few I made 2025-26 that other people might care to use. But I have a lot more that just scratch my own particular itches. Like a Perl/Gtk2 version of MS Paint that interprets arbitrary loaded and painted images as sound, or the things that I use to monitor my ISP uptime/speed, etc.