Mergefly - A modern UI for GitHub pull requests
Teamder - Tinder, but for creating teams at work.
PullRequest.com - Code review as a service
Monolist.co - The command center for engineers. Tasks, pull requests, messages, docs — all in one place
PullReminders - Review and release pull requests faster with Slack reminders and metrics.
Nuclino - Nuclino works like a collective brain, helping teams bring all their knowledge, docs, and projects together in one place. It's a modern, simple, and blazingly fast way to collaborate.