The Security Checklist - The Practical Security Checklist for Web Developers
Coinbase - Bitcoin, safe and easy.
SafeBase - SafeBase is the interactive security portal to share your security posture, automate access to sensitive compliance information, and subscribe to vendor security program updates.
Binance - Cryptocurrencies exchange platform
WordPress Security Scanner - Check if your WordPress site has known vulnerabilities
Poloniex - US-based cryptocurrency exchange with maximum security