Origin is offering Dragon Age - Origins for free as the latest offering in their On the House program. As before the only catch is an Origin account, though you must grab your copy before October 14th. Here's word from EA News:

Relive the opening act of the epic Dragon Age franchise with Dragon Age: Origins, now available On the House with Origin!

Dragon Age: Origins introduced gamers to the rich, detailed world of Thedas, a world filled with deadly mages and powerful dragons. The choice-driven RPG has strategic combat and a personalized story, and it’s free right now with Origin On the House! Just add it to your Origin Game Library and download it whenever you want.

You don’t need to log into Dragon Age: Origins to enjoy the single-player quest; if you see any messages asking you to when you start the game, just skip them, and you’ll be good to go! If you have any questions, visit this FAQ.

Dragon Age: Origins is On the House until October 14th, but once you’ve added it to your library, it’s all yours.