LoyalAs - Get and track referrals automatically.
Twitter Polls - Polls embedded in tweets
Zyte - We're Zyte (formerly Scrapinghub), the central point of entry for all your web data needs.
Simple Poll - The easiest way to create polls in Slack
Sitebulb - Crawl and visualize your website structure
Curious Polls - Answer a question once a day for the chance to win £100/$100