...In the data editor. There are quite a few unused effects/overlays/a couple buildings people could use.

Effects;

irradiate, optic flare, restoration, SmokeAOE (dark swarm?), Glitched out lurker attack, "RazorPlague", toxic creep, Disruption Web (looks nothing like it), planet cracker, null field, phalanxbeam.m3 (ELDFIRE.GRP RETURNS WITH AVENGENCE), overload, soul hunter attack, stasis(incomplete), time bomb.

Overlays;

corruption overlays for BC, Viking

infestation overlays for armory, barracks, biodome(?), colonist hut(?), command center, ebay, factory, merc haven, missile, refinery, starport, supply depot

Buildings;

merc compound building, mineral storage depot, terrazine refinery

Those bastards! I'll have your head for this Dustin Browder!

Thanks for the list Snyfun. Once my main PC is back up these should come in handy.