Python niche:
https://www.portabledevapps.net/jupyter-portable.php
https://www.portabledevapps.net/python-portable.php
https://sourceforge.net/projects/portable-python/files/Portable%20Python%203.10/
https://www.pythonanywhere.com/
POP3 C# goodies:
https://csharp.hotexamples.com/examples/-/Pop3Client/-/php-pop3client-class-examples.html
Windows 10 & 11 Sound Keyboard Application free download
The Linux niche:
The best Linux distro for old computers - Spanish Paradise:
The Uber Ultra Super Linux ever:
NuTyX the swiss king: