What do you mean by large _concept_ application? If you mean large or famous projects in production, Yii 2.0 was just released so there aren't many. For 1.1 th

What do you mean by large _concept_ application? If you mean large or famous projects in production, Yii 2.0 was just released so there aren't many. For 1.1 there are some: https://www.facebook-studio.com/ https://www.facebook-studio.com/, http://2gis.ru/ http://2gis.ru/, http://itop.fm/ http://itop.fm/, https://www.humhub.org/ https://www.humhub.org/, http://www.x2engine.com/ http://www.x2engine.com/, http://zurmo.org/ http://zurmo.org/, https://www.rebilly.com/ https://www.rebilly.com/, http://buildwithcraft.com/ http://buildwithcraft.com/