Starting with Delphi 2005 the IDE provides an API for plugins to add an entry to its about dialog. It’s pretty simple to use and many plugins and components use it nowadays. But there is one thing that in my opinion most of them get wrong.

Starting with Delphi 2005 the IDE provides an API for plugins to add an entry to its about dialog. It’s pretty simple to use and many plugins and components use it nowadays. But there is one thing that in my opinion most of them get wrong. 
http://blog.dummzeuch.de/2015/11/22/adding-an-entry-to-the-delphi-ides-about-dialog/