Haark - Tracks your sites and notifies you if they're down
Hyperping - Cheap uptime and performance monitoring with detailed reporting and flexible alerting
Rollie - Know where your money goes. Spending tracker for iPhone.
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.
CostTeam - Identify online subscriptions and other recurring expenses.
Troops Slack Sales Gong - The most customizable Salesforce Gong in Slack