Cinch's windows resizing feature free/built in alternative?

Hi, I just purchased a new 2010 MBP and I'm upgrading from a Windows 7 Notebook.

A feature I loved on Win7 was the ability to drag a window to the side and have it resized to fit half the screen. I found for Snow Leopard a software called Cinch (http://www.macstories.net/reviews/cinch-review/) that does that but I wanted to know if there was any free or built in alternative to it, I googled and searched the forum but couldn't find anything.

Thanks

 

Actually the "use at your own risk" disclaimer kind of scares me since I'm a total n00b to the mac world

 

Great thanks for your help

One more question to not start another thread. I've been doing my homework lol and I know you can assign each Space to a certain app. What I was thinking was to assign for example Space 3 for VLC to watch movies but I wanted to know if it was possible for me to make that space go directly to the tv when I connect it through HDMI so I don't get stuff in the middle if I keep working on the MBP.

Thanks again