GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Calendly - Say goodbye to phone and email tag for finding the perfect meeting time with Calendly. It's 100% free, super easy to use and you'll love our customer service.
Frog Git - Frog Git is the community-based lightweight code hosting solution that is written in the Go language.
Acuity Scheduling - Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.
Kiln - Kiln is a complete source control management system based on Git and Mercurial.
Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.