From CloudModding OoT Wiki

obj2c
Developer(s) spinout
Written in C
Platform Cross platform
Available in English
Type CLI tool
License Open Source
Website spinout's site

obj2c is a program written by spinout to convert wavefront .obj to compilable F3DEX2 display lists. It is not limited to Zelda, it can be used with any N64 game which uses the F3DEX2 microcode, including homebrew games.