Accessify - Manage access to all the services your team uses
Google Capture the Flag 2017 - Google's 2nd annual worldwide security competition
Stark for FigJam - Stark for FigJam provides designers, engineers, and product managers role specific accessibility checklists.
Startup Security Program by Templarbit - Security practices & tools required to close large deals
Nibbler - Free tool for testing how good your website is, and what you can do to improve it. Check accessibility, SEO, social media, compliance and more.
The Security Checklist - The Practical Security Checklist for Web Developers