Is there any tutorial with similar content on Unity3d?

Hi andrepirre! Yes, we've covered exporting from Blender to Unity in a few courses:

• https://cgcookie.com/course/using-game-assets-in-unity
• https://cgcookie.com/course/modeling-modular-game-assets
• https://cgcookie.com/lesson/final-fixes-and-exporting-to-unity