The source for “My RSS Reader” is now available on Borland's Code Central web site. My other contributions are listed too. You'll find there a variety of projects I've written for Kylix, C#Builder and Delphi 6, 7, 8 and 2005.
I've tried to make “My RSS Reader” is easy as possible to port to Kylix, so those interested might want to consider porting it. Wanna take a stab at it, Robert?
In 2017, with the release of Delphi 10.2 Tokyo, Embarcadero introduced a specialized implementation of the Observer pattern into the System.Classes unit. While it has been in the wild for 9 years, it remains a "hidden" architecture for many, primarily because it serves as the invisible engine behind LiveBindings. Other than live bindings, you can also use the Observer pattern as a way to update component settings to the Windows registry, an .ini file, or persist it elsewhere.
System.Classes