Pre-Jobs Apple did license a few Extensions from Connectix... Jobs-era Apple just didn't care, I guess.

I was around during that time. Around System 7.5 or System 8, they did license a lot of third party utilities. But as far as I know, Connectix was never one of them.

Apple built their own Gen 2 68K emulator. But Speed Doubler was still faster.

In the modern era, Apple did acquire Dark Sky for better weather APIs and an apps and the company behind Automator.