Xobin - Most Comprehesive Pre-Employment skills testing and Psychometric Assessment Platform.
Speechapp - The simplest way to practice for your next job interview
Interviewlab - Stop wasting your time searching job interview questions
Pramp for Product Managers - Practice product management mock interviews with other PMs
Product Management Exercises - A repository of product manager job interview exercises
Interviews on Skype - Test candidates using a real-time code editor over Skype