One example of this kind of aircrafts is the Convari XFY-1 (Pogo), which is also the faster Turboprop* aircraft.
*(only in the theoretical world, the faster Turboprop ever made is the Tu-114)
Another example of this kind of aircrafts is the Lockheed (this guys are in all the strange topics)
More at:
VTOL
http://en.wikipedia.org/wiki/VTOL
Tailsitter:
http://en.wikipedia.org/wiki/Tailsitter
Pogo:
http://en.wikipedia.org/wiki/Convair_XFY-1
Lockheed XFV:
http://en.wikipedia.org/wiki/Lockheed_XFV
Another famous Tailsitter, the X-13:
http://en.wikipedia.org/wiki/X-13_Vertijet
Tu-144, the comercial version of the famous Tu-95:
http://en.wikipedia.org/wiki/Tu-114
Always is recommended to make a visit at Loockheed Martin webpage:
http://www.lockheedmartin.com/