BIM Standards for download

The sheer volume of different BIM standards can be confusing in itself – and that is without even considering the  
a) usefulness, 
b) applicability, 
c) practicality or 
d) up-to-date-ness 
of these different standards

In any case, a recent and decent list has been started at:
CAD addict: List of Existing BIM Standards

Some other useful links / lists:
Weblinks (big list of Standards on natspec.org)
BIM Standard and BIM Example Drawings Sharing (forum thread)
BIM Libraries | Whole Building Design Guide
BIM/IPD Aus (standards and guidelines with Australian focus)