Snarl - Snarl is a notification system for Windows.
Havoc Shield - Cybersecurity built for startups and small business in an affordable, all-in-one suite of tools. Put a cybersecurity program in place in under a week to protect your business from ransomware and cybersecurity attacks.
Notifu - Notifu, a free open source pop-up balloon utility
Vanta - Automate compliance, simplify security.
Notify OSD - Canonicals on-screen-display notification agent, implementing the freedesktop.
Securicy - Control Your Security. Keep Control of Your Time.