Steampunk style wearable glasses computer based on Raspberry Pi. Not a real alternative to the Google glass but with some upgrades it has huge potential.
Vorsprung durch selbstgemachte Technik.
Video (in German only)
Detailed description and downloadables:
http://www.thingiverse.com/thing:127800 by DomesticHacks
here is smaller wearable eye computer project by Codeninja, it has an integrated camera but not detailed build description: