Kufic or Kufi is one of the oldest calligraphic forms of Arabic script. You may have seen it in Muslim art. This cross, by Lebanese Christian Arabic calligrapher named Istfén, is made in the geometic kufi style. Dated 1995.
This image of the cross of death as the tree of life is from an illuminated manuscript in the British Library (BL Stowe 39, f. 23v). If you follow the link you'll find a wealth of other ancient Christian images.
"Sumie Cross" by Isaac Eiranae Fowler Isaac writes: "It's a ink wash paiting, known as shui-mo hua (水墨畫) in Chinese, sumi-e (墨絵) or suibokuga (水墨画?) in Japanese, sumukhwa (수묵화) in Korean, and tranh thuỷ mặc (幀水墨) in Vietnamese." I would like to try this style myself. It appeals to my Zen influenced Christian sensabilities.
I found this crucifix on Sashytrash ... created by Hunters Crossings
This painting, of the embrace of the cross, is by Gloria Leigh. I came across it in an ad for the NATSIEC Indigenous Theology and Spirituality Conference coming up in Baulkham Hills in March 21st – 25th 2011.