is there any REAL evidence of UFO? please provide link and pictures

In fact, there are lots of well-documented cases of UFO sightings. But
that is so because UFO does mean nothing but "unidentified flying
object". It can also be a plane, a dirigible, a balloon, or anything
else in the air that remains unidentified.
If you mean if there is evidence for sightings of alien spaceships, I
assume the answer is "no".

Scriptor

There are the merest handful of photographs of UFOs that so far have
defied alternate explanations or unmasking as fakery.
 This most likely doesn't that they're alien in nature, but that
authentication is beyond our tools and techniques.

There are many thousands of documented cases and hundreds (if not thoudands)
of books published on the subject. Most books published on the subject
would appear to take the view that while many of the sightings can be
explained (i.e. airplanes , helocopters, venus, the moon etc) some of
the sightings defy a normal explanation and could therefore be
sightings of spacecraft from other planets /solar systems. Some people
have suggested even more unusual explanations such as ships  from the
future or parallel universes.

Fewer of the books written on the subject take a sceptical or neutral
viewpoint. Astronomers in general have been sceptical in terms of an
extraordinary explanation required for many of the reported sightings.
 (This does not mean that astronomers reject the idea of intelligent life
 in the universe , it simply means that they believe that sightings of 
 UFO's have nothing to do alien spaceships visiting earth and much
more mundane events can explain the sightings)

 An interesting case is that of the abduction of Travis Walton by a
flying saucer/UFO  which was reported in 1975 (in Arizona).  Walton
was supposedly abducted by a UFO AND the abduction was observed by
five of his work colleages,
who later reported the incident to the police. Walton turned up a few
days later after reporting on his time on the UFO/Flying Saucer.
The movie 'Fire in the Sky' was based on this incident.
Most sceptics maintain that then whole story was a manufactured hoax
concocted by the six people involved (i.e. Walton and his five work colleagues) 
The problem with this is that one or more would almost have certainly
admitted to the hoax.

Another explanation has been made more recently in which hoax was
rather more elaborate than just a concocted story. One of Walton's
co-workers was his cousin and it is believed that the two of them
actually stage managed an event
to look like a UFO abduction (potentially with the help of 1 or more other 
 participents) The other 4 work colleagues therefore saw an event
which appered to them as a real UFO abduction.
Cheers
Mongolia

Hi,
Think that this may be useful
http://ufos.about.com/

try this http://www.meta-religion.com/Paranormale/UFO/bob_lazar.htm   
     x    many weird and wonderful things

This is real evidence! (just look at the
guy!)http://alsocanadian.blogspot.com/2005/02/prime-minister-under-alien-control.html