Good news for all fans of my minimalist Flow Editor. The software is now open source (under 2-clause BSD license) and available on GitHub under the name flowed. To build it you will need as well: nn-c and akima. They’re used just for interpolation (natural neighbor and bicubic respectively) and can be linked statically. Fortran compiler is required to compile akima. There’s also a Mac OS X version available in the releases section on GitHub: here. Hope you enjoy and maybe develop it further.
09/02/2016 ======================== nn-c and c++ conversion of akima library is included in the source tree.