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I'm pretty sure Altium Designer, a decent and pricey EDA suite, is written mostly in Delphi.

Yeah, I believe it is too. And its primary scripting language is still DelphiScript. We use it daily at my company.

Have a look here:

https://www.devexpress.com/Products/VCL/

Especialy their datagrid is the most advanced and fun thing to work with.

The Delphi product page has examples of UI features available in the VCL and FMX: http://www.embarcadero.com/products/delphi

Last I knew Skype (at least for Windows) was written in Delphi. That knowledge is a few years old so may no longer be true post-Microsoft acquisition.