If you can think of any other maps we play that aren't here, add them. T'is a wiki after all.
Spacebuild Maps
http://www.garrysmod.org/downloads/?a=view&id=60488 SB_Forlorn_SB3_R2L
http://www.garrysmod.org/downloads/?a=view&id=14058 sb_gooniverse
http://www.garrysmod.org/downloads/?a=view&id=60564 sb_voyages
http://www.garrysmod.org/downloads/?a=view&id=59207 sb_new_worlds_2
http://www.garrysmod.org/downloads/?a=view&id=62099 SB3_InterStellar_2008
Sandbox Maps
http://www.garrysmod.org/downloads/?a=view&id=57687 gm_botmap_v3
http://www.garrysmod.org/downloads/?a=view&id=58712 gm_excess_construct
http://www.garrysmod.org/downloads/?a=view&id=61193 rp_industrial_lake_hdr
http://www.garrysmod.org/downloads/?a=view&id=63946 gm_mobenix_v3
http://www.garrysmod.org/downloads/?a=view&id=58584 gm_bigcity