Trying out Mate, because the Source games don't play well with Openbox and evilwm (my two favorites). Mate works well, although I don't like the panel too much. Might switch it out to tint2.
GTK & Metacity (Marco): Naos by horst3180
Icons: Faenza by tiheum
Wall: Alemania Sand by memovaslg
Apps: Caja, Eye of Mate, URxvt with weechat, env-info and scrot in tmux
Dotfiles at GitHub