Product Hunt - A website that lets users share and discover new products
HackerOne - HackerOne provides a platform designed to streamline vulnerability coordination and bug bounty program by enlisting hackers.
Betafy - Where startups meet beta users!
Acunetix - Audit your website security and web applications for SQL injection, Cross site scripting and other...
Beta Family - 50,000 testers to test your app
Trustwave Services - Trustwave is a leading cybersecurity and managed security services provider that helps businesses fight cybercrime, protect data and reduce security risk.