Kamen Rider W's forms
From left to right:
Cyclone Joker,
Luna Trigger, and
Heat Metal
The first name corresponds to the right side, while the last name corresponds to the left side. So you have Cyclone, Luna and Heat for the right side, and Joker, Trigger and Metal for the left side. Note that the colors can be mixed and matched in more combinations (the initial image of W a while back shows Red and Black, hence "Heat Joker" as shown below).