Do humans have free will?

The Fatwaa of Al-Jannah Al-Daa'imah says:

الإنسان مخير ومسير ، أما كونه مخيرا فلأن الله سبحانه أعطاه عقلا وسمعا وبصرا
وإرادة فهو يعرف بذلك الخير من الشر والنافع من الضار ، ويختار ما يناسبه ، وبذلك
تعلقت به التكاليف من الأمر والنهي ، واستحق الثواب على طاعة الله ورسوله والعقاب
على معصية الله ورسوله . وأما كونه مسيرا فلأنه لا يخرج بأفعاله وأقواله عن قدر
الله ومشيئته

Humans have free will and do not have free will. As for having free will, then it is because Allah, the Exalted, gave him intellect, hearing, sight, and the ability to do and he, by means of all this, recognizes good from evil, beneficial from harmful, and chooses that which is appropriate. And with this is related the responsibility of obeying orders and avoiding sins which man has been given and he gets rewarded for obeying Allah and His Messenger  and punished for disobeying Allah and His Messenger. 

As for his not having free will, then that is because he cannot escape the Decree and Will of Allah by means of his actions and sayings.