Most minis should be sourced in their respective gallery entry, but nonetheless:
Tachikoma, Fuchikoma, Think-Tank: Scratchbuilt from a variety of materials, including wood craft bits, metal washers, plastic, and cardboard.
Special Forces: Old Grenadier "Future Wars" miniatures sculpted by Mark Copplestone. Those minis are available from EM-4 Miniatures.
Terrorists: The ringleader´s from the old Warzone "Cartel Agents" blister pack, while the hit squad is foundry.
Batou is a full sculpt made from "Magic Sculp" modelling putty. Great stuff, the best I tried so far.
The Ops truck was made from a PC-Designed cardboard modelling plan which I then printed onto 300g/sqm cardstock.