It correctly connects letters and it can do Czech and Slovak accents. It is based on a Metafont source (to be used in TeX) from Petr Olšák, I wrote Python code that reproduces Metafont's Bezier curves algorithm, generates curves as SVG, then calls Inkscape to convert the curve to its boundary, imports back into Python from SVG and then it generates OTF curves and the final font.
https://certik.github.io/slabikar-otf/
It correctly connects letters and it can do Czech and Slovak accents. It is based on a Metafont source (to be used in TeX) from Petr Olšák, I wrote Python code that reproduces Metafont's Bezier curves algorithm, generates curves as SVG, then calls Inkscape to convert the curve to its boundary, imports back into Python from SVG and then it generates OTF curves and the final font.