Well I routinely mention much the same as what can be found at these places
Matrix Games - Steel Panthers World at War.
SP Camo - more Steel Panthers (SPWW2 and SPMBT).
JPs Panzers - Panzer General Series.
Underdogs (plenty of games in general).
No membership required, no fee involved, but then you do have to download them.
TOAW,the Campaign series, Close Combat series short of someone just wanting to give you theirs, they are still an item on sale (even if usually for peanuts).
Want a good opportunity, check this link.
http://s3.invisionfree.com/Les_s_Place/index.php?showtopic=316
It's still going to cost you 5 bucks, but you ain't going to find more normally free games faster.