Ruby_index_0

Analog clock
Checking hashes of files
Display a git repository
Easy ansi color plus more.
Easy way to use Graph Facebook API without ad-hoc libraries
Get external IP
Loaded assemblies
Multidimensional arrays
Playing with GDI+ (brushes)
Print letters with different case
rdd (mostly broken but shows how to do a few things in ruby)
Reading all subvalues of key
Retrieve codecs
Retrieving product key with IronRuby