Good collection of images showing periodicity of the Table?
I have an entire chapter regarding periodicity in my textbook. Have a look at the images in it:

Atomic Radius:





Ionization Enthalpies:



A summary of periodic trends:



These are the pictures in my textbook. As a bonus, I'll even add a few examples from our day-to-day life:

Alkali Metals:
Lithium:



Sodium:



Potassium:



Rubidium: (its enclosed in glass because it spontaneously combusts in air)



Cesium:



You can notice that properties of elements periodically repeat. All the alkali metals have silvery appearance, with cesium having a little bit of yellow-golden in it. They are soft, and have exceptionally high reactivity.

Halogens:

Fluorine:



Chlorine:



Bromine:



Iodine: 



You can see that all the halogens are quite colored, and most have low melting and boiling points. Thats why fluorine and chlorine are gases, while bromine is a liquid with thick vapors. Iodine, however is a solid due to higher attractions due to increased molecular mass. All the halogens are quite reactive, with fluorine and chlorine violently so.

Transition Metals (a few examples):

Iron:



Cobalt:



Nickel:



Chromium:



You can see how the transition metals are quite similar to each other. They are lustrous in appearance, are quite hard, and also display quite a few catalytic properties. For example, iron is used in the manufacture of ammonia, nickel is used to hydrogenate vegetables oils, palladium is used in catalytic converters, et cetera.