Blender's long-standing fracture tool, now distributed as an official extension. Select a mesh, run Cell Fracture, and it splits the object into convex pieces, which is how most pre-broken debris for games is made. Several Godot destruction add-ons, godot-destruction-plugin among them, expect their fragments to come from here.
At a glance
Licence
GPL-3.0-or-later
Commercial use
commercial OK
Credit
Not required
Status
active: License spot-checked at the source; the entry carries dated evidence.