Tango Card - Tango Card bundles an awesome catalog of e-gift cards and other e-rewards with easy-to-use technology and expert program support.
Simple Poll - The easiest way to create polls in Slack
Rybbon - Send digital e-gift cards as marketing incentives or rewards with Rybbon, which integrates with Marketo, HubSpot, SurveyMonkey, and Qualtrics.
GitHub Polls - Polls for GitHub issues and readme
Giftbit - Buy, send and track digital gift cards for your reward and incentive programs.
minipoll - Create simple shareable polls in seconds