Ok I looked up OpenWRT compatibility. I will start trying to find homes for this stuff, but let me know if it's useful.

1 × Asus RT-N53
Don't think it supports OpenWRT
1 × Belkin N450 DB
Don't think it supports OpenWRT
1 × Linksys WRT54GL
Supports OpenWRT but maybe not worth keeping around?
1 × Linksys WRT54GL v1.1
Supports OpenWRT but maybe not worth keeping around?
1 × Linksys WRT300N v1
Supports OpenWRT
1 × Netgear WNDR3300
Supports OpenWRT
5 × Netgear WNDR4000
Supports OpenWRT
1 × Netgear WG311v3 (PCI card)
N/A it's a PCI card :)

--mark