Top 4 C++ dimensional-analysis Projects

UNITS

1 813 0.0 C++

a compile-time, header-only, dimensional analysis and unit conversion library built on c++14 with no dependencies.

Project mention: EzGz - An easy to use single header no dependency library for decompression of .gz archives written in modern C++ (probably faster than zlib) | reddit.com/r/cpp | 2022-11-15

You may be right about this. I'm actually mainly concerned about including as just including it can increase binary size substantially, see e.g. https://github.com/nholthaus/units/issues/32
units

6 690 9.6 C++

A compile-time enabled Modern C++ library that provides compile-time dimensional analysis and unit/quantity manipulation. (by mpusz)

Project mention: C++'s smaller cleaner language | reddit.com/r/cpp | 2022-12-31

Indeed you cannot. Then again, you couldn't write a library like fmtlib in C in the first place. I mean why do you complain about C++ features which enable you to write libraries you otherwise couldn't? How would you expect to implement equivalent libraries to EVE or mp-units in C alone?
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unlib

0 30 0.0 C++

a light-weight, header-only, dependency-free, C++14 library for ISO units
Dimwits

0 8 0.0 C++

A compact C++ header-only library providing compile-time dimensional analysis and unit awareness (by njoy)

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2022-12-31.