Making a 3D game for GameJamPlus? These are free to use in your entry.

Free sample: 3 rigged low-poly PS1-style characters on a 17-bone humanoid rig: an office worker and a nurse (idle, walk, run, talk, wave, sit) and an infected student (zombie idle, walk, attack). GLB and FBX, tested in Godot 4.5 and Unity 6. Commercial use is fine and no credit is needed.
https://sh4rkdev.itch.io/everyday-npcs-free-sample

Browser demo with all 44 characters and every animation: https://sh4rkdev.itch.io/psx-townsfolk-zombies-web-demo

AI disclosure: the characters are AI-assisted (procedurally generated in Blender with AI-written scripts, reviewed and tested by hand in Godot and Unity). Please check the jam's rules on AI assets before you use them.

Good luck with your games!