Google Capture the Flag 2017 - Google's 2nd annual worldwide security competition
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Startup Security Program by Templarbit - Security practices & tools required to close large deals
Dowork - A collaborative software cost and time estimation app
The Security Checklist - The Practical Security Checklist for Web Developers
HMTMAA - Clever tool to estimate cost of building an app