Planning Poker - Open source implementation of planning poker game (collaborative online estimation/voting tool).
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Firepoker - Agile Planning Poker powered by Firebase and AngularJS
Zapier - Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.
Taiga - Project management platform for agile developers & designers
n8n.io - Free and open fair-code licensed node based Workflow Automation Tool. Easily automate tasks across different services.