- Mathematica(https://www.wolfram.com/mathematica/scrapbook/) — Still going, and Stephen Wolfram won’t let you forget that

- xScope (https://xscopeapp.com/history) — OK, I’m cheating, 19 years, but still a notable tool in my toobox

- Transmit (https://panic.com/transmit/) — Though it debuted as “Transit”, it’s been going since 1998