1. 3.ly

2. a.gd

Note: A similar service would be a.nf.

3. r.im

4. u.nu

5. x.vu

6. z.pe

7. tinyarro.ws

Note: A similar use of Unicode is found at txtn.us URL shortening service.

Bonus - untiny.me

Untiny.me allows you to un-shorten or to get the original URL of a shortened one.