Here is my Version of Wavin' Flag. The whole song in Tabs.
It's my first tab, so maby there are a few mistakes
Standard Tuning ; Key of C

Intro :           !Faster        !                          2x
e|------------------------------------------------------------|
h|------------------------------------------------------------|
g|------------------------------------------------------------|
d|--2-----0--2--------320--2---020----------------------------|
a|-----3------3------3----3--3--------------------------------|
E|------------------------------------------------------------|

Vers                                                        4x
e|------------------------------------------------------------|
h|------------------------------------------------------------|
g|-----------------------------------00-----------------------|
d|-2---0-2-0---------------------2--2-----00-2-0--------------|
a|-----------3----0--3-2-0-----------------------3------------|
E|-------------------------3----------------------------------|

Bridge                                                      2x
e|------------------------------------------------------------|
h|------------------------------------------------------------|
g|----------0--2---222--22-0---------------00-2---222-22-0----|
d|--------2-----------------2-0----------2----------------2-0-|
a|--33--3-------------------------333--33---------------------|
E|------------------------------------------------------------|
                                    1x
e|------------------------------------|
h|------------------------------------|
g|-2-0--------------------------------|
d|-----3-2----------------------------|
a|------------------------------------|
E|------------------------------------|

Chorus                                                      2x
e|------------------------------------------------------------|
h|------------------------------------------------------------|
g|------------------------------------------------------------|
d|------020------33-3-2-0---22-2-0------00-2-0----------------|
a|--3-3-----3----------------------3-----------323------------|
E|------------------------------------------------------------|

I think after the Chorus you start with the intro again.

The Chords are :
1. measure C (Or C5)
2. measure F (Or F5)
3. measure A (Or A5)
4. measure G (Or G5)

You can play the whole sing just with this 4 measures.
Oke, hope you enjoy & have fun (;