Culture Codes - Company culture decks aggregated all in one place
Xobin - Most Comprehesive Pre-Employment skills testing and Psychometric Assessment Platform.
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
Interviewlab - Stop wasting your time searching job interview questions
Culture Your Culture - Finally, the much needed step-by-step "how to" for culture
Product Management Exercises - A repository of product manager job interview exercises