Delphi
Object Pascal-based RAD tool from Borland 1995. Visual GUI builder + fast compiler. Dominated Windows desktop development in the 90s. Lives as Embarcadero Delphi.
Anders Hejlsberg was lead architect (the same person who later designed C# at Microsoft, then TypeScript). Kylix (2001) was the Linux version, died quickly. Delphi lost ground when .NET came (2002). Embarcadero acquired in 2008. Lives in legacy Windows enterprise apps, is still actively updated — new versions support Windows, macOS, iOS, Android, Linux. Lazarus + Free Pascal is the open source alternative.