WP CODA Green free WordPress theme is based on the WP CODA theme by Greg Johnson. WP CODA itself was created to "mimic the functionality of the very popular Coda website.
I managed to fix weird tabs display in IE6. Also the size of images and scripts is reduced significantly (this means that WP CODA Green will load much faster than original), I tweaked and twisted WP CODA to my taste. There's bigger header now and no big tabs with bubbles in the header. I also removed integrated Fancybox so you can use whatever Lightbox Javascript you want.