This PLL recognition trainer will help you practice your recognition of each of the 21 PLL cases by looking at only 2 sides of the cube. As a free member you can take as many untimed tests as you wish.
CubeSkills premium members are able to record and time all of their tests. This way you can track your improvement over time, as well as see which PLLs take you the longest to recognise, to assist with improving your last layer speed.