TLA Systems has updated PCalc (www.pcalc.com), for macOS, to version 4.4.3. The upgrade adds support for the Touch Bar on the new MacBook Pros.
PCalc is a scientific calculator with support for hexadecimal, octal and binary calculations, as well as an RPN mode, parentheses, programmable functions, and an extensive set of unit conversions. With version 4.4.3, almost any key in PCalc can be mapped directly onto the Touch Bar, and there are additional shortcuts for accessing recently used functions, conversions, and constants, as well as changing the display mode.
This is a free upgrade for existing users. For new users the cost is US$9.99. PCalc requires macOS 10.8 and later. It’s available at the product website and the Mac App Store.