TestFlight - iOS beta testing on the fly.
GitSpo - Measure & engage your open-source community
Boombox.io - iOS devs rejoice! Embeddable HTML and hosted TestFlight beta sign-up forms.
Devo - Devo delivers real-time operational & business value from analytics on streaming and historical data to operations.
Visual Studio App Center - Continuous everything – build, test, deploy, engage, repeat
LibHunt - LibHunt tracks mentions of software libraries on relevant social networks. Based on that data, you can find the most popular projects and their alternatives.