PlanITpoker - PlanITpoker is a cool on-line planning poker app that helps Agile project teams estimate projects easily.
Postman - The Collaboration Platform for API Development
Taiga - Project management platform for agile developers & designers
Postwoman - An online, open source API request builder
Craft.io - All-in-one product management software for entire product lifecycle
Selenium - Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that.