Hyperping - Cheap uptime and performance monitoring with detailed reporting and flexible alerting
SmallDevTools - Handy developer tools with a delightful interface
WebGazer - Monitor your website's availability with WebGazer, review its performance and get instant notifications when your website goes down. No installation required and free plan available.
Google Open Source - All of Googles open source projects under a single umbrella
Troops Slack Sales Gong - The most customizable Salesforce Gong in Slack
whatdevsneed - This is whatdevsneed.