Time Zone Converter - Time Zone Converter is an online productivity tool to calculate exact time across time zones.
Twitter Polls - Polls embedded in tweets
Slash TZ - Natural language time zone converter for Slack & Hipchat
Simple Poll - The easiest way to create polls in Slack
Jive Chime - Real-time messaging for your team
Curious Polls - Answer a question once a day for the chance to win £100/$100