The best replacement for free pascal is delphi.

The best alternatives to free pascal are rated as following:
★★★★★  delphi
★★★★★  turbo pascal
★★★  gnu pascal
★★★  lazarus

Your alternative for free pascal is not listed? Suggest!
Speaking about free pascal, one probably shouldn't forget about lazarus.

Other search terms related to free pascal and their ratings are:
★★★★★ lazarus
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Google Trends

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free pascal
delphi
turbo pascal