You put in a long URL, such as
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=&ie=UTF8&ll=41.829537,-88.250771&spn=0.0456,0.109949&t=h&z=14
and Linkyy spits out a nice short URL, e.g.
So far, Linkyy has saved 937,301 characters from 29,986 URLs. That's an average of 31 characters per URL.
Linkyy was written by Rockwell Schrock.