The server can hold unlimted custom maps. Here are a few of the more popular maps that might happen to pop-up on the server (Most files will be hosted on a external server)

All these files are hosted on Jolt.co.uk's ftp server. You can only Download 1 at a time and keep hitting refresh till the file appears as it is always busy :>

aim_akcolt.bsp here

aim_ak-colt.bsp here

aim_map.bsp here

aim_map_usp.bsp here

as_alpine.bsp here

as_highrise.bsp here

as_oilrig.bsp here

crazycar_v2.bsp here

cs_alpin.bsp here

cs_arabstreets.bsp here

cs_assault2k.bsp here

cs_bunker.bsp here

cs_deagle5.bsp here

cs_facility.bsp here

cs_ragearena.bsp here

cs_rio.bsp here

cs_robbery.bsp here

cs_tire.bsp here

de_foption.bsp here

de_scud.bsp here

de_simpsons.bsp here

fy_iceworld.bsp here

fy_pool_day.bsp here

he_tennis.bsp here

helms_deep.bsp here

supercrazycar2.bsp here