SparkFin - Learn the markets for free, profit forever.
Netumo - Ensure healthy website performance, uptime, and free from vulnerabilities. Automatic checks for SSL Certificates, domains and monitor issues with your websites all from one console and get instant notifications on any issues.
Robinhood - Free stock trading service.
AppZero - AppZero is a monitoring and migration tool that allows users to keep track of different applications and servers in both simple and complex IT environments.
StockTwits - A financial communications platform for the investing community.
RedGate SQL Monitor - SQL Monitor helps you and your team find issues – before they become problems