You might have heard about Popcap's successful tower defense-style game Plants Vs Zombies. While you can download a free demo of the game, Popcap is making things even easier by launching a free Flash based version on their official web site.

The Flash versions doesn't have all of the content and features of the downloadable PC game but it does have an extra Zombie unit that isn't in the full PC version of the game. There are three available gameplay modes, 14 levels, a total of six zombie types and a total of 12 plant units. All in all this should be a huge distraction for people at work as well as an effective way to sample the full downloadable PC game.