Betatesters.io - The platform connecting mobile developers and beta testers
Fusebot - Write custom commands to integrate anything on Slack/Discord
Betafy - Where startups meet beta users!
Invision - Prototyping and collaboration for design teams
Beta Family - 50,000 testers to test your app
zipBoard - ZipBoard is a web-based visual bug tracking & issue tracking tool that helps developers, testers and project managers collaborate during website and elearning development.