what mapping tools do you use?

[squi]

Im looking to pick up mapping for CS:S i did a tiny bit in 1.6 although i forget a few things im hoping i can pick source up like i did that. Im curious where/ what to download for my map editor to start off with.

 

[Shinobi]

the map editor is included in the SDK

 

[squi]

sorry.. i wish i knew this before hand but thanks a bunch for the help