Maximizer is an OS X Lion app that brings full-screen to support to all Cocoa apps that haven’t been updated for the new operating system yet.

The app, which was developed by well-known jailbroken iPhone app developer chpwn, won’t work with Carbon apps, but popular apps like Chrome, Firefox and TextMate will work fine with Maximizer.

There’s a warning that apps that do have proper full-screen support may not work with Maximizer installed, so use with care, but so far reports are positive.

This app seems to be chpwn’s first public foray out of iOS development and onto the Mac. It’ll be interesting to see if there is more to come.