Bored of Grey, Light Grey and Orange Dev textures?
Well this is for you!
6 Coloured Dev Textures: Green, Light Green, Blue, Light Blue, Red and Dark Orange!
Just extract the ColourDev.zip file, Copy the ColourDev folder, Paste it into the materials folder of what ever game you've configured your Source SDK to. They should appear in the Texture Explorer in the Hammer Editor. You will also need to have a copy of the ColourDev folder in the materials folder of the game you intend to play you map on, or the texture will appear as pink and black checkers.
If you like Dev textured maps then check out my map Gm_City_Freerun: http://www.garrysmod.org/downloads/?a=view&id=68702