There are 2 repositories under bmfont topic.
Bitmap Font Generator Online
BMFont compatible, cross-platform (Linux/macOS/Windows) command line bitmap font generator (FreeType2 based).
Tools for working with monochrome bitmap fonts
Component for parsing bitmap font files generated by AngelCode's BMFont utility
Online bitmap font creator
A C# library for reading and writing AngelCode bitmap fonts in binary, XML, and text.
Bitmap font generator (BMFont) file to C++ static data converter
Cross-platform bitmap font packing tool. Based on Hiero (https://github.com/libgdx/libgdx/wiki/Hiero)'s open source.
Quick and not-so-dirty Monogame BMFont (http://www.angelcode.com/products/bmfont/) support
An application to democratize and hopefully simplify font conversion for GFX artists such as Tooll3 users.
ReFreezed Bitmap Font converter - convert simple bitmap fonts to AngelCode's BMFont.
Converts BMFont-format fonts into GMS/GMS2 font resources
A Beef library for reading and writing AngelCode bitmap fonts in binary, XML, and text.
Tool for creating/editing custom bitmap fonts for Northlight engine. (*.binfnt)
A command line application for converting and analyzing AngelCode bitmap fonts.
CLI BitmapFont packer tool powered by Java, libGDX & PicoCLI.
A tool (HTML file with JS logic) serving as BMFont's .fnt to SCS' .font convertor for ETS2/ATS
C# library that reads binary files in BMFont format
Convert a BMFont font to an Irrlicht XML font
BMFont support for the Mini Micro
A collection of Python scripts with no particular theme. Thus, a virtual junk drawer!
A lightweight bitmap font renderer designed for embedded and other resource-constrained applications.