You can evaluate Sublime Text for free, but the code is proprietary, and if you use Sublime Text continuously you should buy a user license for $99, and possibly a Sublime Merge license as well ...

Sublime text is free to download for trial use; a license for a single user on infinite machines, with free upgrades, is $59.

With its custom interface and text-editor sensibilities, Sublime Text 2 offers a polished editing experience that rewards familiarity with comfort and speed.