All of the Modified L4D1 maps: http://www.l4d2.upc-gamers.com/download.php?list.3
Freezer Burn: http://www.l4dmaps.com/details.php?file=4457
Badwater Basin (TF2 map conversion): http://sites.google.com/site/jsparak...badwater-basin
Dead City II: http://www.l4dmaps.com/details.php?file=4517