Mattermark - Ranking 800,000+ high growth Internet companies
Survey Monkey - Create and publish online surveys in minutes, and view results graphically and in real time. SurveyMonkey provides free online questionnaire and survey software.
Breakout List - A list of the fastest growing startups
Self Test by Ahead App - Receive anonymous & honest feedback on your social skills
Crunchbase - Crunchbase is a platform for discovering industry trends, investments, and news about companies around the world.
Matter - Create a feedback-focused culture in Slack with Matter!