It had an awesome IDE, debugger, and help.
[1] http://www.freepascal.org/
[2] http://www.lazarus-ide.org/
I could've also mentioned Turbo C(++), which was almost equally nice.
[1] https://channel9.msdn.com/Blogs/Seth-Juarez/Anders-Hejlsberg...
[2] https://news.ycombinator.com/item?id=11685317
It had an awesome IDE, debugger, and help.