The fonts in the AMSFonts package, converted to TTF and OTF files using TransType 4.
The original PostScript font files use an ancient format that is not well supported today. As a result, I converted all of them into TrueType and OpenType files using TransType 4.
The content in TTF files are identical to that in OTF files; I added OTF in addition to TTF because the OTF files are smaller in size.
Feel free to use them all!
PS: the fonts in amsfonts-otf.zip is converted from AMSFonts(Type1) to OTF using the open source software FontForge by Firestar-Reimu.
I do not provide the TTF files because this:
PostScript fonts(OTF and Type1) use qubic splines but TrueType fonts(TTF) use quadratic splines.
More information is provided in https://github.com/Firestar-Reimu/AMSFonts-OTF