The GTK theme is about 6 years old, made by a guy who has left deviantArt (and also Linux) also about 6 years ago. I love it. It has a classic feeling to it, opposed to the super smooth stuff usually made nowadays. It's interesting to see how much our preference changed over the years (I only switched to Linux about 2 years ago, but I did use it before that too)...
GTK: Tempura by ~Lokheed [link]
OpenBox: a modified Mint
Icons: came with icogen [link]
Wall: Mellow by =winnichip [link]