A simple use of shapes with some basic effects makes this poster quite likable. Here is another free poster which can be used literally for any business. It comes with 3 PSD files (A3, A4, A5) and smart objects that allows you to do the editing with only few clicks.
Format: Layered PSD
Smart Objects: Yes
Dimensions: A3, A4, A5 with bleeds
Minimum Photoshop Version: CS3
Size: 111 Mb