Challonge - The Ultimate Source for Tournament Brackets
SessionStack - Record and replay web app issues. See them the way they happened to end users.
smash.gg - An esports platform empowering bottoms-up growth of competitive communities with value-add services...
Balto - Easy feedback with screenshot / videos for your beta apps
Score7 - Score7 is a free tool that allows you to generate the tournament schedule according to the format and the number of participants that you specify.
Video Contact Forms by Typeform - Get 10x more personal with your site's visitors from Day 1