Hyperping - Cheap uptime and performance monitoring with detailed reporting and flexible alerting
Twitter Polls - Polls embedded in tweets
UXPin + Slack - Keep tabs on design projects in Slack
Simple Poll - The easiest way to create polls in Slack
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.
Curious Polls - Answer a question once a day for the chance to win £100/$100