A Onslaught 1st version money hack. Makes the game really easy and possible to get up to extremely high waves. You start with $1.000.000

Prevent aquatic life from entering your water station by building towers. Click on fishes to attack them. As you progress through the levels, more towers will be unlocked. (sorry for the lousy image)

Defend your girlfriend against lines of creeps, game from Addicting Games. Looks really good. Towers with a nice range too.

DesktopTD Pro gives you the best defense game from the series, build and upgrade in different modes, even a tutorial for starters is available. Includes multiplayer!

Build and upgrade your mushrooms to defend the farm. A nice and pretty world, scroll through the map with the mouse. Towers are pretty basic but do have some upgrades. Also a useful minimap.

Build your towers smart against the different waves. The background-graphics are a bit overdone so I doesnt look too good.