Xobin - Most Comprehesive Pre-Employment skills testing and Psychometric Assessment Platform.
The PM Interview - Practice PM Interview Questions (w/ timer).
Interviewlab - Stop wasting your time searching job interview questions
Pramp for Product Managers - Practice product management mock interviews with other PMs
Interviews on Skype - Test candidates using a real-time code editor over Skype
Myskillwall - The best tool to prepare your job interview