uDMX is a DMX Sender Interface originally invented by anyma.ch.
A short list of advantages:
I build a version without smd parts and wrote software for windows and linux. Get the windows driver.
uDMX Artnet node
uDMX DMX sender USB-DMX Interface OpenSource Firmware Artnet Art-Net node uDMX driver OpenDMX µDMX
DMX-Control FreeStyler MagicQ
USB DMX DIY
several clones off uDMX: AVLdiy.cn D512 / X-uDMX512, uDMX512, USB-UDMX512