eMule - eMule is a free peer-to-peer file sharing application for Microsoft Windows.
Startup Security Program by Templarbit - Security practices & tools required to close large deals
Shareaza - Shareaza is the most luxurious and sophisticated file sharing system you'll find.
Google Capture the Flag 2017 - Google's 2nd annual worldwide security competition
Soulseek - Soulseek® is a unique ad-free, spyware free, and just plain free file sharing application.
The Security Checklist - The Practical Security Checklist for Web Developers