Some African bronze and copper spearheads.
The big one is, I think, West African.
The small one came in the mail today. When it was discussed here a few years ago, no definite identification was clear (
http://www.vikingsword.com/vb/showthread.php?t=8221). Sub-Saharan Africa.
The middle one, copper I think, isn't a real spearhead (see the closeup of the butt end). Currency? It's sharper than I'd expect for such a thing. Not sharp enough to make me think it's a knife.